How long should my subject line be? Stephanie Price-Bell October 29, 2018 11:43 Updated Follow DESCRIPTION: We recommend keeping your Subject lines to the point. Suggested Subject line length should be no more than 45 characters. RESOURCES: Check out our our blog posts regarding subject lines. Related articles How does the send rate limiting setting on my mailing work? What's supported in Delivra's Salesforce integration? How do I create a segment for Browsed Data? What is Automation? Can I attach a file to a mailing? Comments 0 comments Article is closed for comments.