[Dovecot] SSL / TLS Problem

Leander S. leander.schaefer at googlemail.com
Mon Jul 12 20:07:49 EEST 2010

  Am 11.07.10 15:59, schrieb Stan Hoeppner:
> Leander S. put forth on 7/11/2010 8:24 AM:
>> There is something else missed - I just don't get it ;/
> The solution to your problem, or at least information pointing you in the
> right direction, is in those Google search results, if you'd bother to
> actually read some of them.  I guess you'd rather wait for someone here to
> solve the problem for you instead of spending that time solving it yourself?

Hi Stan,

you most probably think I'm just too lazy & impationed to google my 
problems - but it's not. I more and more get the feeling that this is 
ether a Thunderbird incompatibly or a little switch which is missed in 
the dovecot.conf to get compatible - but I'm not getting it.
I set up Dovecot SSL/TLS & Postfix SSL/TLS for several times succesfully 
now ... and now oll of a sudden it stops working with Thunderbird 
version 3.1 ?!

Out of my frustration I was even using http://dovecot.org/doc/mkcert.sh 
to create the neccesarry files - but with the same result ;(

Therefore I would really more then appreciate a hepful hint if possible 
- cause I'm really stucking at a point where I'm not getting to anything 

Here are three screenshots of the Thunderbird situation - even though 
it's in german - I think everybody knows how it looks in english isnce 
it's a common dialog.


Local: same as public - works

And here again the mailog output:

server dovecot: imap-login: Disconnected (no auth attempts): 
rip=, lip=, TLS handshaking: SSL_accept() 
failed: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca

It's always the same when it fails ...

And this is how my dovecot.conf looks like:


## SSL settings
ssl = yes
ssl_cert_file = /etc/ssl/mail/mail.cert
ssl_key_file = /etc/ssl/mail/mail.key|


Thank you

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