“Mailman has dramatically made my inbox more sane and manageable.” Mailman HQ
: Built-in archiving, automatic bounce processing, content filtering, and integrated spam filters. Mailman Free Download
: Reviewers generally consider it one of the best mailing list managers available, though some "old school" versions were criticized for mailing out passwords in plaintext by default. 2. MailmanHQ (Gmail Productivity Plugin) “Mailman has dramatically made my inbox more sane
“mails out user passwords in plaintext every month by default. Insane. Old school mailing list software.” SourceForge On MailmanHQ (Gmail Plugin) automatic bounce processing
The following quotes reflect user experiences with these different "Mailman" tools: On GNU Mailman (Open-Source List Manager)