MX and A

Good day guys.
My MX and A configurated in your base but they are not working .What is a problem another WEBs working but this no
host []
SMTP error from remote mail server after end of data:
550 non-local sender verification failed
Reporting-MTA: dns;

Action: failed
Final-Recipient: rfc822;[[email protected]]
Status: 5.0.0
Remote-MTA: dns;
Diagnostic-Code: smtp; 550 non-local sender verification failed

What is a problem .If u can ,answer detailed please,cause I am new . i have got this message on 3 my boxes

Domain name used in the “MAIL FROM” SMTP envelope when sending to
mailboxes served in our system must be valid (have
A- and MX-record).
Please check the return address used in the SMTP envelope

Answer from
but all it’s fine.

You’ll need to check with the owner of the mail server. Based on the error message the specified host has rejected mail because non-local sender verification failed. There is no actual standard for that… so perhaps they can tell you what they are checking.

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Your Mx record points to a host that doesn’t exist. You may want to recheck your settings.

Apparently not based on whatever this host checks.

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If i change SMTP mail for forwarded messages,may it helps?

up thanks

And it 's not working only with mailer

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