> On 08/06/2026 16:41 EEST Jochen Bern via dovecot <[email protected]> wrote:
> 
>  
> Am 08.06.26 um 15:24 schrieb Aki Tuomi:
> > One thing to mention right off the bat is that Dovecot has not
> > allowed unencrypted logins by default, even if Outlook has.
> > 
> > This has required, even in the past, that you set
> > `disable_plaintext_auth = no`, which allows you to log in w/o SSL.
> Hmmm, the author wrote that port 110 was left open for the sake of 
> clients wanting to do STARTTLS, so which kind of "w/o SSL" are we 
> talking here ... ?
> 
> (I admit that there's no clear demonstration - a la tcpdump or wireshark 
> - in any versions of the report I've seen *proving* beyond doubt that 
> auth+e-mails went through the wire *un*encrypted ... other than Outlook 
> versions apparently being affected that are said to *predate* STARTTLS.)
> 
> Kind regards,
> -- 
> Jochen Bern
> Systemingenieur
> Binect GmbH

Without the setting, you have to use either STARTTLS or direct TLS (your 
connection must be secured/encrypted), or dovecot will not let you in, and will 
give an error. It does not matter if you use 110 or 993.

Aki

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