It is not possible to send an email to firstname.lastname@example.org from several mail providers. An error message appears: 550 Invalid DNS MX or A/AAAA resource record
The following mail providers are affected: gmx.de; gmx.net; web.de; 1und1.de probably other providers are affected.
The following mail providers have been successfully tested: gmail.com; xerox.com
So why is the service not available from german mail providers?
We are looking into the issue you are reporting to diagnose the root cause.
We are attempting to verify a fix.
Would you please send an email to:
To see if you get a response?
Please let us know if you get a response email.