El día viernes, marzo 11, 2022 a las 03:12:41p. m. +0100, Stefan Hagen escribió:
> > I've been seeing a lot of that lately. Google seem to have tightened > > their email security practice recently. > > > > It appears that 1blu is doing something that GMail doesn't like. They > > probably have a number of users who have the same problem. I would > > ask them to check their MTA configuration against the section "Make > > sure your messages are authenticated" in the referenced page > > (https://support.google.com/mail/answer/81126#authentication). > > > > > 550-5.7.26 This message does not have authentication information or > > > fails to > > > 550-5.7.26 pass authentication checks. To best protect our users from > > > spam, the > > > 550-5.7.26 message has been blocked. Please visit > > Authenticated in this context means, you don't have SPF / DKIM / DMARC set up. > > You can use this service: https://www.mail-tester.com to test your > setup. It provices you an email address. Send an email to it > and then your mail and server setup will be evaluated. Thank you, Stefan. I did such a test and the result can be seen here: https://www.mail-tester.com/test-ahwup3i9z > This is an example from me: > https://www.mail-tester.com/test-3ghr082f2 > > Feel free to examine it and set your host up in a similiar way. As far as I understand all the changes can't be done on my host (a laptop). I send mails with mutt and mutt with sendmail to smtp.1blu.de And I'm afraid, if I contact the support of 1blu I don't know if they will react (I've mixed experience from the past). I will give it a try... Thanks matthias -- Matthias Apitz, ✉ g...@unixarea.de, http://www.unixarea.de/ +49-176-38902045 Public GnuPG key: http://www.unixarea.de/key.pub
