Re: Can't send mail with smtpmail "any more". (Gmail and other providers)

[Eli Zaretskii]

> From: Vladimir Nikishkin <lockywolf@gmail.com>
> Date: Tue, 27 Oct 2020 12:49:24 +0800
> 
> Sometimes (unpredictably), the connection times out and produces the
> following message:
> 
> ```
> network-stream-open-starttls: make client process failed: Network is
> unreachable, :name, smtpmail, :buffer, *trace of SMTP session to
> smtp.gmail.com*, :host, smtp.gmail.com, :service, 587
> ```

This seems to be self-explanatory: Emacs is unable to connect to that
address and that port.  Are you sure there isn't some connectivity
problem on your side?  Like some firewall settings, or maybe actual
connectivity issue?

smtpmail.el has a debug facility, whereby you can set a variable and
get a buffer with the details of the connection session.  If the above
doesn't give a clue, try looking at those details.