Subject Lines Live – Best of May 2022

Having trouble finding an effective subject line for your emails? May-be you can find inspiration in what our users have been sending out!

The daily top 5 can be found here.

The Top 5

Subject Line CTR %
MDR Software Update 88.13
Download the Key Risk Indicators White Paper 81.65
Product Catalogue 2021 78.6
Here is your download from Freeman Clarke! 70.79
👋 Hi, Hey, Hello 66.04


The Rest of the Month

Average Score: Trending Up

May’s average CTR was 23.36%, significantly up from April’s 17.27% (a 35% improvement).


Average Length: Trending Down

Characters: 31-40 characters was once again the dominant grouping. Unlike in April [link here], no other bracket came close. The overall average was slightly down on April, at 44.63 characters.


Words: No change here, with the vast majority of subject lines falling in the 1-10 words grouping. The degree of dominance grew slightly with 87.74% of subject lines (up from 86%).


Word Length: Consistency once again; 6-10 letter words made up 94% of the content this month.


Personalisation: Trending Down, Performing Well

“#First_Name#? #First_Name#? #First_Name#?”

Fewer than 10% of May’s subject lines contained any personalisation.

Those that did still outperform those that didn’t, although the performance gap was narrower this month than in April.


Emojis: Trending Up (Just), Performing Quite Well

A slight improvement in fortunes for the emoji this month, appearing in 5.16% of subject lines (up from 3.33% in April).

This was accompanied by a reversal in performance, as subject lines with emojis slightly outperformed those without (16.67% CTR vs. 16.05%). A blip or a new lease of life? Watch this space to find out!


Sender Name: Trending Up,  Performing Badly

The number of subject lines containing a Sender Name shifted up by 4 from April to May (14.67% to 16.67%).

However, there was also a 4-point drop in CTR for this group, taking their overall performance below that of their non-Sender Name rivals (14.96% average CTR vs. 16.31%).



Sales/Marketing subject lines still dominate, edging closer to 50% of the data in May. Newsletters and Functional sends dropped slightly, with Events taking up the slack.


Sending Day

After a murky picture in April, with all the days clumped together, we saw a significant difference in May. Monday was the most effective day overall, the first time in a while that a weekend day lost this title.

However, overall the weekend still outperformed the working week, with an average CTR of 15.78%, compared to 14.82% for Monday to Friday.

Over to you!

Feeling inspired? Great, put these tips into practice and watch your CTR soar!

Still not confident? As well as predictive AI tools built into our platform, we’ve created our own subject line analyser, so you can test your subject lines before sharing with your audience. What are you waiting for?

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