Cannot receive emails: failure: Sorry,_no_mailbox_here_by_that_name._(#5.1.1)/

[Marc Ruiz]

Hi,

I'm using version 1.0.6 - free at this moment. I can send emails, but I cannot receive them: this is what I'm seeing in the logs:

2017-08-02 21:20:55 [e-mail] delivery 2: failure: Sorry,_no_mailbox_here_by_that_name._(#5.1.1)/

Does anyone know, what can be happening?

I also receive an email back saying:

Hi. This is the qmail-send program at *****.cat
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<hello@******.cat>:
Sorry, no mailbox here by that name. (#5.1.1)

--- Below this line is a copy of the message.
....

I attach the test of my DNS:

[Marc Ruiz]

I changed the Mailserver hostname as in my first attempt was the same as the domain name and now it works (mailserver hostname now is different from my domain name). It seems that when the mailserver hostname is the same as the domain name something strange happens.