On 2025-07-16 11:51, Frank Bures wrote:
Recently I have not been able to send root system mail from my Fedora 42
machine using Sendmail via gmail SMTP relay. It worked reliably since I
built this machine more than a year ago.
Any attempt to send mail either from cron or from CLI returns:
relay=smtp.gmail.com. [142.251.185.109], dsn=4.4.1, stat=Deferred:
Connection timed out with smtp.gmail.com.
I generated a new app password for my sendmail and appropriately changed
and regenerated /etc/mail/authinfo*.
No cigar.
Does anyone have any idea where to look at?
E-mail from Thunderbird works normally as this message proves.
An additional info:
If smtp.gmail.com resolves to an IPv6 address, relaying works. If it
resolves into IPv4 address, the above error ensues.
I checked my firewall, there is nothing relevant to the smtp.gmail.com IPv4
addresses.
Thanks
Frank
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