I've been using regularly net-mail/email-2.3.2 for some days now, using different types of authentication, several SMTP server. and it went well all times. Reproducible: Always Steps to Reproduce: 1. 2. 3.
You're right - this one should be marked stable on both x86 (I'll do it) and amd64.
Stable on amd64, thanks for the bug report.