Issue Plesk - AWS Route 53 - Mail problem

[Qhiliqq]

Server operating system version

Ubuntu 20.04.4 LTS

Plesk version and microupdate number

18.0.43 Update #1

Hi,

I'm migrated from a "old" server to a new one and also switched to route53 only for dns.
Plesk itself runs on hetzner.
The big problem is, all customers wrote me a mail that email doesn't work on mobile phones in cellular, wifi works.
I can't really figure it out and tested with a demo domain on the server, same problem.
So I switched back my demo domain to a other dns service and voila all mails coming through.
Route53 and the other dns service have exactly the same records.

What could be the problem?

Best regards
philipp

 

[IgorG]

It would be valuable to know what error records appear in Plesk maillog when clients try to use mail when cellular connected.

 

[Qhiliqq]

There is no log, cause the clients aren't able to connect to the server.
They doesn't coming through.

"Unable to connect"

If I turn wifi on and flush the dns on my phone and router, everything works fine.

 

[IgorG]

Strange. Do you assume that this maybe service provider's issue?

 

[Qhiliqq]

Maybe I got it...
Glue records missing on domain provider, maybe there is a loop and cellular mode stops it.
I'm testing now.