1 Only spammers end up on blacklists 

While it’s true that blacklists can use spam traps to find people sending unwanted emails, anyone is at risk of ending up on one. You can make sure you don’t by using double opt-ins, engagement-based sunsetting, and address validation.

2 Never remove recipients from your list 

Unengaged  email recipients (haven’t opened an email in some time) should be deleted from your list through an established sunsetting process. 

The average email list loses over 20% of its active contacts every year. 

3 Unsubscribes are THE WORST 

Unsubscribes aren’t bad. In fact, an unsubscribe is simply someone telling you they no longer want your messages. By removing them, you can improve the quality of your list and prevent unengaged recipients from marking your messages as spam. 

4 The more images, the better 

Images should be used thoughtfully. While some can make an email more visually appealing, too many can impact deliverability. Make sure your text to image ratio is closer to 60:40 or 70:30. 

5 Sending more email means more revenue 

Email marketing is a great revenue driver,,but the more you send to your list, the less people will engage. Increasing your sending frequency has diminishing returns, so it’s better to test and find the right frequency for your recipients. 

6 Always use GIFs 

GIFs within messages absolutely make them appear more interesting, but they don’t always render correctly. Prior to adding GIFs, make sure they’re necessary and will render on your recipients’ devices. 

7 Never send marketing email on the weekends 

While the day of the week may seem extremely important, if your recipients are eager to receive your email, it doesn’t matter when you send your message. However, people are more likely to read email on a mobile device on weekends, so if you do send, make sure your messages are mobile responsive! 

8 Messages don’t NEED to be mobile responsive 

They do! These days, half or more of your recipients will be checking email on a mobile device of some sort. As a result, your messages must render correctly and be engaging on any platform. 

9 The more links in a message, the better 

You may be inclined to give recipients a lot of options within your messages for interaction. More information, new resources, or new products all compete for clicks. The truth is, recipients should know exactly what to click as soon as they open your email. This means including one (MAYBE two) calls-to-action per message. 

10 CTA colors 

Change the colors of your CTA buttons to determine if recipients engage more with a certain color palette. It may not seem impactful, but some colors can stand out and convert more. 

11 Always include discounts in your subject lines 

Including a discount in your subject line doesn’t always mean that people will be more inclined to open your email. If you’re going to do it, make it stand out with something unique, instead of the common 20%, 50%, or 75%. 

12 Always send messages by 11am EST 

Like the day of the week, the time that you send your message isn’t as important as making sure your recipients are engaged with all (or most) of the messages you send in general. 

13 Emojis make emails more fun and increase open rates 

Before including emojis in your subject line, evaluate your audience, content, and the purpose of your email. An emoji in a fun marketing email to a younger audience may make sense, but including an emoji in a password reset email or receipts might be inappropriate. 

14 Subject line A/B testing 

While it may not be necessary for every send, A/B test which subject line resonates best for the same message to a small segment of your list. Depending on the winner, send that subject line out to all contacts. 

15 Seed testing is always necessary 

Seed testing is good for many email campaigns, but it isn’t always necessary. For instance, if you’re sending a very targeted email to people you’ve sent to numerous times before, seed testing may be unnecessary. 

16 

There’s one perfect time to send 

In general, there’s no magic time for sending email to your recipients. However, if you watch the engagement statistics of your recipients, you may be able to determine which segments of your customers open mail at different times of the day. Armed with that knowledge, you may be able to schedule sends based on when they’re more likely to open your email. 

17 Any email list works 

One of the biggest misconceptions is that any recipient list will work. The fact is, using a list you “acquired” is the best way to get blacklisted or damage your sending reputation. To maintain a good reputation and improve your deliverability, you should only send to people who want and expect your emails. 

18 Your “From” address should always come from your company 

Depending on the message and the purpose, this may not be true. For instance, an account- related message could be sent from “support@” while a survey request may come from a specific person at your company. Test some variations of your “From” address to see what gets the most engagement. 

19 Keep up with current events 

Make content timely and relevant with holidays, large news stories, or other events. If you’re sending a newsletter, you can make it themed, or refer to a well known event to make it more topical. 

20 Number of images or image:text ratio 

We generally recommend that messages are not entirely image-based, but testing the number of images used in messages is a good way to see if recipients prefer to visualize or read your content. 

21 Always avoiding spam trigger words will keep you out of the spam folder 

It is true that there are trigger words that make it harder to reach the inbox, but that’s not to say they can NEVER be used. We suggest you limit the number of “spammy” words, and make sure they’re used as necessary. 

22 Consider triggered email 

See how you can use data to trigger some messages. Actions like cart abandonment, repeat purchases, or visiting a product page multiple times are all signals that you may be able to capitalize on. 

23 The only metric you need to worry about is clicks 

While clicks do provide good insight into the effectiveness of your call-to-action, and help you learn about the traffic that comes to your site from your email, it is not the only metric worth looking at. Look at the ratio of opens to clicks to determine if there’s a disconnect between your subject line and your content. Keep an eye on spikes in spam complaints and unsubscribes to learn if you’re sending too much or too often. Learn more about other industry metrics and benchmarks in SendGrid’s Global Email Benchmark Report. 

24 If it looks good in my test send, it’s good enough to send 

A lot of times marketers will send a test message to themselves to make sure the email looks okay. Unfortunately, that only shows you the email in one browser or in one device. Try using a service like Litmus or Email on Acid to make sure your messages are rendering correctly on all devices and clients. 

25 Attaining 100% delivery rates is possible 

Unfortunately, getting 100% of you messages delivered correctly to every recipient isn’t the best goal to strive for. Instead, try to send the right message, to the right person, at the right time, with the right frequency. Doing this will ensure your messages are valued and read more often. 

26 Test out a live Twitter feed 

Go beyond social widgets by including a live Twitter feed in your email, and allow recipients to see what’s happening when they open your message.

27 Sending transactional and marketing email from the same dedicated IP is fine 

If you’re sending any significant amount of email (more than 1,000 messages a month), you want to separate your email and send marketing and transactional emails from separate IP addresses. You can learn more about why in our blog. 

28 A dedicated IP address doesn’t need to be warmed up 

A new, dedicated IP address has no relationship or reputation with your email or the inbox provider you want messages to go to. This means it’s critical that you warm up your IP by slowly increasing the amount of email you send from the address until inbox providers know you are sending trustworthy, wanted email. 

29 

EMAIL IS DEAD 

Another false assumption is that email is no longer a viable place for marketing communications. In truth, unlike social or search advertising, email provides more accurate tracking statistics that allow you to know your recipients at a much more granular level. 

Click to tweet 

30 All recipients are basically the same and should get the same content 

Every now and then you may send a marketing email that can go to all recipients, but for the most part, if you want to increase engagement, it’s better to segment recipients and target them with purposeful content as much as possible. 

31 Reward your VIPs 

Rather than simply testing new campaigns to brand ambassadors and high-engagers, consider giving them a special promotion or offer to thank them for their interest. 

32 A new IP will solve everything 

Unfortunately, a simple change to your IP address will not improve your delivery rates. In fact, a new IP address has no reputation, and will be throttled by inbox providers even more. The best thing to do is to reevaluate your sending practices and your lists so that people are getting messages they will open. 

33 CTA placement within the email 

CTAs don’t have to be included at the very end of messages. You may think about adding CTAs to the top or middle of the message to see what resonates most with your contacts. 

34 Use different CTAs 

Rather than using something bland, like visiting your site, you may try different wording or offers in your CTAs to make them stand out more. 

35 If a recipient gives you their email, you can send them as much email as you want 

When someone provides you with their email, make sure the types of email you’ll be sending (and the frequency that they’ll be receiving those messages) is clear. If you bombard a new contact with numerous marketing emails, they may flag you as spam. 

36 Email is only good for some industries 

Some industries (like ecommerce, travel, and daily deals) are clearly very dependant on email, but that’s not to say that other industries shouldn’t use email as a customer communication channel. Email continues to be the best way to reach customers in a secure and trusted way. In addition
to that, it provides insights that other channels can’t. No matter what industry you’re in, email is a great tool to use. 

37 Make it personal 

By using advanced segmentation strategies and dynamic content, like name tags or other substitutions, you could be making your campaigns more personable than ever before. 

38 Delivery rate is the same as inbox rate 

This may be one of the largest misconceptions in email. The fact is, a “delivered” email simply means that the email was accepted by the inbox provider. This is good because you at least know that it wasn’t blocked. Unfortunately, that doesn’t mean the message landed in the inbox—it could be in the spam folder too. 

Experiments

Tweaks and changes made to small sends or to your entire email program can have large impacts. Here are some to consider.  The only way to make sure your email program is cutting edge and getting the engagement you want is to constantly have tests and experiments running. By evaluating the aspects of your messages that definitely work, and those that fail, you can make sure your recipients are getting the best messages possible.  Below is a list of test and experiment ideas that you can use to improve your email campaigns.

39 Buttons vs. hyperlink text 

A large CTA button may make sense, but depending on the type of message you’re sending, a simple hyperlink in the text may make more sense. 

40 Keep an eye on competitors 

Make sure you have a fast-action plan in place to take advantage of new, topical events, or changes in your competitive landscape. 

41 Different personas? Different copy! 

There are many different types of people using your product or service, so don’t communicate with them in the same manner. Use more technical language for a technical user, and use more descriptive and fun language for others. 

42 One link vs. multiple 

While it is good to give recipients one clear CTA in an email, offering another option may make sense. For instance, measure if a welcome email performs better sending people back to your website or app, or if a link to educational materials garners more engagement. 

43 Use different copy for high-engagers vs. low-engagers 

If you’ve already segmented your recipients based on their level of engagement, you may also want to create copy that speaks more to high engagers than low engagers and vice versa. 

44 Switch up your newsletter formatting 

Like your templates, you might want to test whether one column with lots of scrolling or multiple columns with modules are more effective for your contacts.

45 The best place in Gmail is the “Primary” tab 

Gmail’s “Primary” tab is meant for messages from direct contacts. The likelihood of messages arriving there is low. As a result, most marketing messages are going to end up in the “Promotions” tab. Rather than trying to get your messages to appear in a different tab, make sure your content is valuable and wanted by recipients. 

46 Social sharing widgets 

Evaluate your goals with your messages and determine if you want people sharing the offer or discount you’re providing. If you do, test whether your social widgets are placed further up in the message or made larger. 

47 Copy length 

Determine if a short amount of text along with a CTA, or a longer, more descriptive amount of text is better for your campaigns. 

48 Plain text vs. HTML 

A plain text email provides the reader with nothing but text and information, while an HTML message may provide a more media-focused message. Send both types to see what your contacts engage with more. 

49 Daily updates vs. weekly digest 

Test to see if your daily messages to contacts could be replaced by a weekly digest. 

50 Preheader text 

There’s more to an email than just the subject line, content, and CTA. Use your preheader text to inform contacts of what else is in the message, or ask a question in the subject line, and then answer it in the preheader preview. 

51 

Personalize more than just the name 

Making sure you incorporate your recipient’s first name is a great first step, but what else can you personalize? Consider sending messages based on their actions or other information you know about them. 

Click to tweet 

52 From address 

Who the message is coming from plays a big role in whether your recipient will open your message or not. Experiment with sending from the company, a department, or an individual. 

53 ALL CAPS 

Using caps in the subject line may generate a spike in interest, so you could try it for one-off campaigns, or maybe putting a customer’s name in caps may grab their attention more. 

54 Subject line length 

As always, subject line length can (and should) be tested to see what works best. We’ve seen 3-word subject lines resonate well, but depending on your contact list, longer lines may be best for you. 

55 Play by the rules 

If you think your email is being blocked by inbox providers, review the domestic and foreign email laws that apply to your contacts. You may need to make some adjustments. 

56 Clicking through to your site vs. providing info in your message 

Some marketers prefer to hint at promotions offered on-site, while others provide the full promotional content within their messages. Determine which is better for different segments of your contacts. 

57 Having a plan is the best plan 

To keep your emails interesting throughout the year, create a sending calendar and plan your messages as far ahead as possible. 

58 “Free” in the subject line leads to more opens 

Many marketers believe that including large discount percentages or the word “Free” will lead to more opens. This may be true sometimes, but in general, if people are interested and engaged in your email, they’re going to open your messages regardless of “free” or the discount offered. 

59 Subject line emojis 

Emojis are great for some contacts and come across as less professional to others. Test to see what types of subject line characters your contacts prefer to see. 

60 Seek out inspiration 

Make sure you look at print and other media outlets to keep your designs and styles modern and intriguing for your recipients. 

61 Just send the email again if the recipient didn’t engage the first time 

If a recipient hasn’t engaged with an email, DO NOT repeat the send. An unegaged recipient is a signal that they aren’t interested in that message. By sending a copy of the message a second time, you’re more than likely going to get marked as spam, which will negatively impact your reputation. 

62 Send frequency 

If you’re sending a daily update, consider testing a new frequency. Perhaps a once-weekly or once-monthly digest gets more clicks and conversions than a daily message that’s ignored most of the time. 

63 Content 

Use content to your advantage by experimenting with longer-form messages or short requests to leave the message and come to your website. You may be surprised by what customers prefer! 

64 

Change the tone of your messages 

Marketing emails can feel redundant after awhile. Test what kind of tone resonates with your contacts the best. Maybe your messages can be more playful instead of professional. 

Click to tweet 

65 Segment 

Create targeted campaigns based on different customer segments. Customers who come to your website (or make purchases) often should be treated differently than people who seldom visit. 

66 Millennials don’t use email 

Many email marketers wrongly assume that millennials are only interested in push notifications or MMS. The fact is, millennials, like other generations, are more inclined to read, keep, and trust email messages. 

67 Should customers be able to respond? 

Consider allowing customers to reply to messages instead of including a “do not reply” address. 

68 Consider emphasizing different features or highlights 

Mix up your product announcements or pair them with new, unique offers to make sure your emails never get stale. 

69 Buying lists is a fast, easy way to get new contacts 

Many marketers assume that buying a contact list will give them access to thousands of people instantly. In practice, these contacts have no idea who you are. When inbox providers see those recipients ignoring messages or marking them as spam, they’re going to block
messages from getting to the inbox. 

70 Fonts 

Whether you’re testing size or type, using different fonts can highlight various portions of messages or make them stand out from the other messages in the inbox. 

71 Templates 

If you’ve been using the same template for a while, consider making some tweaks so that content is presented differently. Perhaps a new change will be your go-to from now on. 

72 Preheader text doesn’t matter 

The preheader is the text that appears after the subject line in an inbox. Many senders ignore this content preview, but more savvy senders use it to their advantage by incorporating it. 

73 Remember that there’s strength in numbers 

If you’re looking for new design, template, or content ideas, bring in other team members. There is often wisdom in the group, and it’s likely that your teammates have seen something new and interesting that you might want to apply. 

74 Every email has to be in HTML 

Your email is not required to be coded in HTML at all. In fact, if you are sending messages in HTML, we encourage senders to include a plain-text version of the message in case those messages don’t render properly. 

Inspiration

Ideas and tips for improving your email program.  An evolving email program doesn’t stop at testing and evaluating things. Sometimes you need to be inspired by outside influences or get ideas for new email elements.  The inspiration tactics below will help you identify things you can add or try out to switch your emails up.

75 Sending an email that’s just one huge image is popular and fun! 

The appeal of sending an email that is just an image is clear. The message looks better, and it may be more intriguing for the recipient. The problem is that this is a common tactic used by bad actors. Make sure your messages include both text and images to ensure you’re getting inboxed correctly. 

76 Brevity is best 

Consider making your message as brief and to-the-point as possible so it can be viewed and interacted with on any smartphone screen. 

77 Subject line hint vs. description 

While some people like to be teased by the subject line of emails, others want to know exactly what the message includes. Make sure you know what types of subject line wording your contacts prefer. 

78 Sending time of day 

Many senders are committed to sending at a certain time each day. Test whether or not this is the optimal time for your recipients by spreading a campaign out over the course of the day and measuring engagement. 

79 Go interactive 

Making email as interactive as possible, and getting recipients involved with your messages, is another way you can generate interest and excitement about the email you’re sending. 

80 Use welcome emails to your advantage 

Use your welcome emails to demonstrate the types of content your recipients can expect to receive, including educational tips and special offers. 

81 Experiment with hero image placement 

Are there opportunities to include hero images in more of the email, rather than having it push content down? 

82 How are you appealing to contacts? 

Are you letting them know how much money they’re saving? Perhaps you’re telling them how your service will make their job easier. Either way, test to see what type of emotional appeal resonates best with your recipients. 

83 

Ask your customers what they think 

Surveys are a great way to find out what your customers like and don’t like. These don’t need to be limited to your brand, consider sending surveys about email campaigns or other business-related ideas. 

Click to tweet 

84 Messages don’t NEED to be mobile responsive 

They do! These days, half or more of your recipients will be checking email on a mobile device of some sort. As a result, your messages must render correctly and be engaging on any platform. 

85 Consistency is key 

Make sure your brand messaging and appearance is consistent. This means your email templates, images, landing pages, and website should all share similar attributes, making a seamless experience for contacts. 

86 Offers/discounts 

While steep discounts and other offers may drive additional opens and clicks, you should test what discounts work best. Perhaps using an uncommon discount in the subject line will help your message stand out in the inbox. 

87 Expand your segmentation strategy 

Segmentation doesn’t end with demographics; try to segment customers based on their past actions or purchases. 

88 Personalization is overrated 

Personalization drives a connection between the recipient and the sender, so we encourage you to use it wherever possible. That may mean substitution tags for names or sending messages to specific segments of customers. 

89 Give your designs a makeover 

Refresh designs so they aren’t stale. If you’ve been using the same design for multiple emails, it may be time to give them a facelift.  

90 Give your subscribers a break 

If you aren’t already, use a preference center to learn exactly what recipients want to receive from you, and give the option of pausing your messages instead of completely unsubscribing from your list. 

91 Get internal support 

Demonstrate your expertise and highlight your email campaigns by encouraging other people at your company to sign up for your campaigns. 

92 Save yourself from surprises 

It’s always important to test your assumptions. Even if you’re sure you’re right, you might surprise yourself. So always test every change you want to make, whether it’s big or small. 

93 Test types of images 

Not all images resonate with all contacts. Test GIFs, infographics, or images of videos to see what drives the most engagement. 

94 Use interactive elements within messages 

Messages don’t have to just be words, images, and CTAs. Ask contacts to engage with messages more directly to make them want the next message you send them. 

95 Saying “sorry” goes a long way 

Everyone makes mistakes when sending email, so it’s important that you learn from your mistakes, and acknowledge them with an apology email if necessary. 

Learn from those you don’t admire 

To keep your emails interesting throughout the year, create a sending calendar and plan your messages as far ahead as possible. 

96 

Catalogue and save emails you love 

You can create an inspiration folder to pull ideas from in the future. You can also create an email inspiration address that other team members can forward great messages to. 

Click to tweet 

97 Consider other uses for email 

Email doesn’t always have to be used to send marketing messages or promotions. Use email to amplify other assets at your organization and help educate or coach your contacts. 

98 Test HTML5 

While not all browsers or email clients are HTML5 compatible, if you can determine which of your contacts do interact with HTML5, you may be able to make your messages even more valuable. 

99 Coordinate all of your communications 

You don’t want your recipients receiving multiple emails from you in a single day (or even week), so coordinate email campaigns with other notifications and limit the number of appearances you’re making. 

100 Link shorteners are great shortcuts 

A link shortener may make links appear shorter and make it easier to send your message, but this is another tactic used by bad actors to hide phishing links. As a result, many inbox providers will block your messages if you use shorteners. We encourage all senders to use the full link (even if it includes long tracking parameters)