[Users] Autoconfig does not support port 465 in SRV record

Andrej Kacian andrej at kacian.sk
Thu Apr 13 09:16:04 CEST 2017

On Mon, 10 Apr 2017 12:20:14 +0200
Jack <jaccode at virginmedia.com> wrote:

> Hello,
> Virgin Media uses SSL/TLS on port 465 for email submission via SMTP:
> $ dig _submission._tcp.virginmedia.com -t SRV +short
> 0 1 465 smtp.virginmedia.com.
> https://help.virginmedia.com/system/templates/selfservice/vm/help/customer/locale/en-GB/portal/200300000001000/article/HELP-2203/Email-Settings-for-all-Virgin-Media-domains
> Claws Mail supports SRV records for autoconfiguration. Unfortunately, it always assumes that STARTTLS (=explicit SSL/TLS) is used for SMTP. But in this case I need implicit SSL/TLS on port 465.
> I would like to suggest that the autoconfig wizard in Claws Mail tests if STARTTLS works for SMTP. If it doesn't, it should try implicit SSL/TLS.
> If this is not possible to implement, I suggest that implicit SSL/TLS is always used for port 465. It is very unlikely that someone would be running STARTTLS on port 465. Ports 25 and 587 are commonly used for STARTTLS.

Fixed in git, even though technically this is incorrect. See the
relevant commit message for details:


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