Plaintext access is no problem if the connection is secured via other means - for example internal network or VPN. If the IMAP server cannot be accessed from the outside, and the traffic don't travel over wifi or public networks, no danger.
-----Ursprungligt meddelande----- Från: dovecot-boun...@dovecot.org <dovecot-boun...@dovecot.org> För Alexander Dalloz Skickat: den 7 juli 2020 18:05 Till: dovecot@dovecot.org Ämne: Re: Outlook vs Thunderbird Am 07.07.2020 um 08:07 schrieb Mark Constable: > > FWIW I meant if the client is Windows7/old-Outlook then changing > either 993/SSL or 143/STARTTLS to 143/NONE could help pick up the > mail. We had to do this for a 100 or so clients a few months ago after > upgrading to Ubuntu 20.04. Curious, what's the rationale behind that move? Is it because that old beast of Outlook does not have the capabilities modern TLS/STARTTLS implementations require regarding TLS minimal version and ciphers? But plaintext auth for mail access, seriously? Alexander
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