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Re: Can't send mail with smtpmail "any more". (Gmail and other providers
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From: |
Robert Pluim |
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Subject: |
Re: Can't send mail with smtpmail "any more". (Gmail and other providers) |
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Date: |
Tue, 27 Oct 2020 17:02:09 +0100 |
Vladimir Nikishkin <lockywolf@gmail.com> writes:
> I worked around this issue by switching to port 465+ssl/tls
>
That in itself is a good thing :-)
> It almost seems like port 587 got blackholed by something.
Itʼs not uncommon for ISPs to block outgoing port 25, I guess somebody
decided to do the same for 587
> Debugging facilities did not illuminate the situation, the deadlock happens
> before anything is written there.
Itʼs not a deadlock, itʼs just that whoever is doing the blocking just
drops the packets rather than sending a reset, so Emacs is waiting for
a response that will never come (and eventually TCP will time out).
Robert