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 are more likely to land in the Junk folder. 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 can be a trigger for spam filters.
To help your mail reach your contact's inbox, excessive punctuation marks in the subject line (especially exclamation points).
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.
Maximum characters: 140
Avoid using all caps
Overusing capitalization in your subject lines can send your email to your contact's Junk folder. To avoid getting marked as spam, avoid using all capitalized letters in your 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:
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