Ich habe über das Forum eine Mail verschickt und folgende Rückmeldung bekommen:

This is the mail system at host http://www.raketenmodellbau.org.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<RB33415@aol.com>: host mx-aol.mail.gm0.yahoodns.net said: 550
5.7.9 This mail has been blocked because the sender is unauthenticated.
Yahoo requires all senders to authenticate with either SPF or DKIM.
Authentication results: DKIM = FAILURE - SPF web.de with ip 213.239.205.81
= FAILURE. See
https://senders.yahooinc.com/smtp-error-codes/#authentication-failures for
more information. (in reply to end of DATA command)

Hat jemand eine Idee, warum das fehlschlug?

Gruß Achim

Geändert von AchimO am 23. Mai 2026 um 15:24