IRedMail/FAQ/Allow.Insecure.POP3.IMAP.Connection.without.STARTTLS
From iRedMail
Since iRedMail-0.8.0, all clients are forced to use IMAPS and POPS (via STARTTLS) for better security by default. If you want to enable POP3/IMAPS without STARTTLS, please update below two parameters in dovecot.conf and restart Dovecot service:
| File: dovecot.conf |
disable_plaintext_auth=no ssl=yes |
Again, it's strongly recommended to use only POP3S/IMAPS for better security.
