The following addresses had permanent fatal errors ----- <>
    (reason: 554 5.1.0 Sender denied)

   ----- Transcript of session follows ----- ... while talking to
>>> DATA
<<< 554 5.1.0 Sender denied
554 5.0.0 Service unavailable

I am getting above error.

can you tell me any reason when sending email to above address.
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Amit KumarCommented:
is it possible for you to share full NDR?
pramod1Author Commented:
this what I have got, my emails from my domain to is getting denied
pramod1Author Commented:
can it be that I am being blocked
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Amit KumarCommented:
I was checking on MXtoolbox and verify email address did not find any issue with domain. So may your domain is getting blocked by them.
pramod1Author Commented:
so how do I release it. it should be added to safe aggregation list?
Amit KumarCommented:
if is not your domain then you can't do anything from your side, better to contact to this domain's IT team.
pramod1Author Commented:
Amit KumarCommented:
first clear it is your mail domain or customers?

if this is not your domain and you dont have any control over it so how would you troubleshoot issue on domain.

so there is only one thing you can do, contact's IT team. It was clearly written in one line now in explanation.
pramod1Author Commented:
contact to unblock our domain or add in safe aggregation list
pramod1Author Commented:
contact to do what sir?
Amit KumarCommented:
they will check their logs whatever infra at their side. if they find you are getting blocked or anything they may do some remedy. its their decision what they do.

however as per logs still not sure that your mails are getting blocked or recipient has any restriction where your mail is not accepted for any other reason.

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