Outgoing Mails triggered by User Mentions have a broken reply-to Header if it contains a name.

Summary

When sending out an outgoing mail triggered by user mentions, the "Reply-to:" Header breaks down the name if the email has a name in it. For example, if the user has configured the From address in the SMTP Mail Server settings as "Atlassian Support Test <test@atlassian.com>", when the email is sent out it becomes "Atlassian, Support, Test, test@atlassian.com". This will lead to errors when replying.

Environment

• JIRA 6.4.11

Steps to Reproduce

1. Set up a new SMTP Mail Server
2. In the From Address field, input "Atlassian Support Test <your email address>".
3. Create a new issue.
4. Mention a user for the first time in the issue.

Expected Results

The mentioned user would get an Email triggered by the notification with the reply-to header being "Atlassian Support Test <your email address>".

Actual Results

The reply-to header will instead be "Atlassian, Support, Test <your email address>".

Workaround

It is recommended not to put any names in the From Address field in the SMTP settings, instead just input the email address only.