[Dovecot] SSL with startssl.com certificates

Reindl Harald h.reindl at thelounge.net
Mon Sep 16 17:21:25 EEST 2013

Am 16.09.2013 16:10, schrieb Dan Langille:
>> Have you/they tried simply using TLS on 143?  (preferred as POP3s/IMAPs
>> has really be deprecated everywhere for some time now)
> For this test, I reconfigured the server to NOT use IMAPS and restarted it.  Then I went 
> to my iPhone and turned off SSL for this mail account.
> That configuration works for my iPhone.
> Looking via tcpdump, I can see that emails are indeed being downloaded in clear text

you need to understand the difference between IMAPS/POP3S on the dedicated
9xx ports versus STARTLS on 143/110


if you turn off SSL it is turned off
on sane clients like thunderbird you can switch between cleartext/STARTTLS and SSL

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