[Dovecot] 143 STARTTLS/ 993 SSL/TLS query

Eric Shubert ejs at shubes.net
Sat Apr 9 03:52:44 EEST 2011

On 04/08/2011 05:39 PM, Voytek Eymont wrote:
> I'm testing my new dovecot server with Thundirbird
> I can have it working on
> port 143 with STARTTLS, or on
> port 993 with SSL/TLS
> my uderstanding is that on 993 I get encrypted 'password and mail transfer'
> (yes ?)
> so what happens if I use 143 with STARTTLS, is that equivalent to port 993
> if STARTTLS is used ?
> thanks for any insights..

As far as encrypted password and mail transfer is concerned, the answer 
is yes. Port 993/SSL is the older way, and port 143/TLS is the newer 
way. 143/TLS is preferred, in part because it doesn't require a separate 

-Eric 'shubes'

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