Frank Bures composed on 2025-07-16 12:04 (UTC-0400): > 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. I was forced to change to OAuth2 for Google SMTP back around May sometime IIRC, but I made my edit more than a month after Google announced its deadline, looks like 14 March: Google search highlight: [quote] OAuth 2.0, which stands for “Open Authorization”, is a standard designed to allow a website or application to access resources hosted by other web apps on behalf of a user. It replaced OAuth 1.0 in 2012 and is now the de facto industry standard for online authorization. [/quote] For more: https://en.wikipedia.org/wiki/OAuth -- Evolution as taught in public schools is, like religion, based on faith, not based on science. Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata -- _______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@lists.fedoraproject.org Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
