Bug#921205: socket bind() to port 25 for address (any IPv6) failed: Address already in use: daemon abandoned

[Andreas Metzler]

On 2019-02-02 積丹尼 Dan Jacobson <jidanni at jidanni.org> wrote:
> Package: exim4-daemon-light
> Version: 4.92~RC5-1

> For the last two upgrades,
> /var/log/exim4/paniclog:
> 2019-02-02 21:47:07 socket bind() to port 25 for address (any IPv6) failed: Address already in use: daemon abandoned

> As we see from timestamps, it is upgrade related.
> # ls -dog  /var/log/exim4/paniclog /usr/share/doc/exim4-config/examples/
> drwxr-xr-x 2 4096 02-02 21:41 /usr/share/doc/exim4-config/examples/
> -rw-r----- 1  117 02-02 21:47 /var/log/exim4/paniclog

That usually is a local configuration error, starting the daemon both
via initscript and other means, or having another program running that
is bound to 25. The timestamp only shows that the issue was present
after the latest installation/upgrade, it does not imply causality.  :-(

cu Andreas
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