You may have noticed that in Gmail, some of your messages are clipped at the bottom, like this:
Gmail does this to any email over 102kb in total size. So that includes the html, subject lines, tracking and images.
One of the main challenges with this is that not only are your recipients not seeing the rest of the email you wanted them to see, but very often the unsubscribe link will be in the footer, so people may not be able to easily opt out. You’ll therefore be at a much greater risk of people marking you as spam, and damaging your deliverability.
Not only that, but by doing this, Gmail is also cutting out the tracking that determines whether an email has been opened or not, so you won’t accurately know how many people are opening your emails.
To check how large your email is, the simplest way to check is to send yourself a campaign, and download it. In Gmail, this is done by selecting the options dropdown in an open email, and selecting download.
Then, in windows, right click on the downloaded file, go to the properties tab, and you’ll be able to see the total size of the delivered email, including all the html, subject lines, tracking and images.
If this is happening, there are two ways you can solve the problem:
Reduce the length of your email: any emails long enough to be clipped by Gmail are probably not being read thoroughly by recipients anyway, so try and reduce the amount of content. If you absolutely must include everything, it’s better to split the campaign out over two sends, which should help your overall engagement as well.
Check your image proportions and sizes: the most common email width is 600px. If your images are wider than that, not only will the extra resolution not be visible, but it’ll be making the email larger in size. If your images are too big, reducing their proportions or quality will really help your overall emails weight.