In this article:
- Limit the use of punctuation characters
- Limit the total number of characters
- Keep away from misusing capitalization
- Avoid these spam filter trigger words
Emails with "spammy" subject lines will get sent straight to Junk. Here's a set of rules to follow to help get your emails to your readers' inboxes.
Limit the use of punctuation characters
Overusing punctuation is a trigger for spam filters.
To help your mail reach your contact's inbox, avoid using more than 4 punctuation marks in the subject line (regardless of placement/position).
Limit the total number of characters
We recommend limiting the number of characters in your subject line to 50 characters to ensure that your subject line properly displays across all devices.
Limiting the total number of characters in your subject line will allow you to communicate the subject of your email without getting cut off when viewed on mobile devices.
Maximum characters: 140
Keep away from misusing capitalization
Overusing capitalization in your subject lines will send your mail to your contact's Junk folder. To avoid getting marked as spam, avoid using an excessive amount of capital letters, i.e. 50% or more relative to the length of the subject line.
Avoid these spam filter trigger words
Adding certain words to your subject line can trigger a recipient’s spam filter. To help get your emails to your contact's inbox, check the email subject line for common words known to trigger spam filters:
Still have questions? Let us know your question below to have it added to the list or reach out to Support if you need additional assistance. Thanks for being the best part of Kajabi!