"Plaintext authentication disallowed on non-secure (SSL/TLS) connections" despite correct configuration to allow this

[Christian Balzer]

Hello,

this is basically a repeat of this query from last year, which
unfortunately got a deafening silence for replies:
---
http://dovecot.org/pipermail/dovecot/2015-August/101720.html
---

I have mostly 2.1.7 (Debian Wheezy) mailbox servers and the current proxies
are also of that vintage. 

So with "ssl=yes" and "disable_plaintext_auth=no" plaintext logins work,
as per the documentation
(http://wiki2.dovecot.org/SSL/DovecotConfiguration)
and historically expected.

Trying to use a 2.2.24 (Debian Jessie backports) dovecot proy with the
same parameters fails like this:
---
Aug  2 15:45:57 smtp12 dovecot: pop3-login: proxy(chibixxx at gol.com): Login failed to mbxx.xxx.gol.com:110: Plaintext authentication disallowed on non-secure (SSL/TLS) connections.: user=<chibixxx at gol.com>, method=PLAIN, rip=x.x.x.x, lip=x.x.x.x, pid=16066
---

Changing things to "ssl=no" doesn't help and setting trusted networks only
changes the last bit to have "secured" appended  but still fails the same
otherwise.

I really need 2.2.x to behave the same way as before and documented. 

Any ideas and feedback would be most welcome.

Regards,

Christian
-- 
Christian Balzer        Network/Systems Engineer                
chibi at gol.com   	Global OnLine Japan/Rakuten Communications
http://www.gol.com/