[JAMES-3843] VacationMailet should use null sender

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: master
• Fix Version/s: 3.8.0
• Component/s: Matchers/Mailets (bundled)
• Assignee: Unassigned
• Reporter: Karsten Otto
• Created: 27/Oct/22 12:37
• Updated: 03/Nov/22 08:08
• Resolved: 03/Nov/22 08:08

Description

When the VacationMailet sends a vacation message, it uses the original recipient as envelope sender. However, RFC 5230 states
"5.1. SMTP MAIL FROM Address
The SMTP MAIL FROM address of the message envelope SHOULD be set to <>."
While we are technically OK because of the SHOULD, I do not see any real requirement to deviate from the recommendation. In fact, using the null sender can help prevent mail loops. So I propose we change the VacationMailet accordingly.

Issue Links

• links to: GitHub Pull Request #1278
• links to: GitHub Pull Request #1287