When you're going through an email backlog, you generally don't need to review every old version of an unmerged change (maybe just the latest), but you still may want to see every comment.

Having a separate subject line for "I'd like you to reexamine a change." vs. "jenkins-bot has posted comments on this change." would let you click through the comments, then just mark the remainder of the thread as read.

However, to work, this requires an email client that understands threading (using In-Reply-To and friends), so it might need to be an option.

Phabricator has an option for this reason ("Vary Subjects" / "This option adds more information to email subjects, but may break threading in some clients.") (http://fab.wmflabs.org/settings/panel/emailpreferences/).

Version: wmf-deployment
Severity: enhancement