Email chyba - 550 Administrative prohibition - 554 5.0.0 Service unavailable

Hi,

When sending an email, I have a problem with the email not being delivered and I will receive a non-delivery report with the error 550 Administrative prohibition - 554 5.0.0 Service unavailable, I don't know what to do with it at all. Can anyone advise me?

The whole error:

-----Original Message-----
From: Mail Delivery Subsystem [mailto:MAILER-DAEMON@xyz.cz] Sent: Wednesday, November 25, 2020 10:22 AM
To: sdfsdfsdf@example.com
Subject: Returned mail: see transcript for details

The original message was received at Wed, 25 Nov 2020 10:21:41 +0100 from
static-1.customer.o2internet.cz [8.8.8.8]

----- The following addresses had permanent fatal errors -----

(reason: 550 Administrative prohibition)

----- Transcript of session follows ----- ... while talking to
mail.google.com.:
>>> DATA
<<< 550 Administrative prohibition
554 5.0.0 Service unavailable

Reporting-MTA: dns; xyz.cz
Received-From-MTA: DNS; static-1.customer.o2internet.cz
Arrival-Date: Wed, 25 Nov 2020 10:21:41 +0100

Final-Recipient: RFC822; sdfndshf@google.com
Action: failed
Status: 5.2.0
Remote-MTA: DNS; mail.google.com
Diagnostic-Code: SMTP; 550 Administrative prohibition
Last-Attempt-Date: Wed, 25 Nov 2020 10:21:42 +0100

REPLY

Hi,

error 550 Administrative prohibition - 554 5.0.0 Service unavailable will be related to some non-standard recipient mail policy. If your mail server is not on a blacklist, etc., then contact the recipient to have the reason for non-delivery by its mail server administrator analyzed.