E-mail alerts all have a subject line of "DPA Alert Notification: " followed by the name of the alert. Please add an option to customize that text (for example, shorten it to just "DPA", so that more of the subject line would be easily visible on a phone).
Reference: Is it possible to change the default subject line of an e-mail alert in DPA?
For everyone wanting to customize DPA Alert Emails, DPA 2019.4 now provides the ability to:
Check out this long-awaited feature and more at Database Performance Analyzer Release Candidate
The ability to customize the subject and body of an email, including the ability to drag and drop multiple variables related to the instance or alert, has been provided as of release 2019.4.