If you can not find anything in your logs, I will tell the sending party that they have to "prove" that it is your server that has denied the mail. You currently deny that the email has been offered to your server.

It is not to mix jurisprudence into the case but solely to find the real cause of the error.

Regards, Allan Dukat


On 2021-06-23 05:41, ChandranManikandan wrote:
Hi Friends,

One of our client emails is not delivered to our server.
And I have checked the mail queue and smtp logs, but that email domain
is not on our logs.
I have asked clients for a bounce message, but they said there is no
bounce message.
Rest of all the domains email incoming/outgoing is no issue except one
to three domains email receiving on our server.
But we are able to send email to them and they got our email.
Any troubleshooting needs to be done on my server?

My server is Centos 7 64 bit with qmt.
I Appreciate anyone who helps me.


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