Support for mailu-front connect logs

[jijins1]

Mailu is a self heberged mail service composed of several service.
Mailu-front take all Smpt/pop/imap connection and often probed by some ip.

One log i see regulary is this one

2025/03/30 04:11:38 [info] 13#13: *282249 client login failed: "AUTH not supported" while in http auth state, client: 10.0.0.1, server: 0.0.0.0:25, login: "violeta@test.com"

[jijins1]

I've opened a pr ##1315
First time here i've maybe missed some convention