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I managed to fix the issue! The my_networks in postfix was incorrect. It contained 2 incorrect IP addresses. After correcting these and restarting postfix all is working

It does not arrive... just tested this. I do not get a boune mail (yet). ==edit== This is the mail system at host xxxxxxxxxxxxxxxxxxxxx. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please...

Yes they are all fine. When I mail from mail.com --> customer + my own gmail address, it only arrives at my gmail. When I reply the gmail address to customer + mail.com address it arrives at both. Also I disabled fail2ban on the server

Yes, all is setup fine. Also tested and confirmed by mxtoolbox. Some say its port 25 which is giving back: 502 5.5.2 Error: command not recognized Causing callbacks to fail.

Its with all customers and all email addresses. But it is an inbound issue. Its when I'm doing tests from mail.com or facebook.com. Gmail works fine. I'm quiet lost on this issue

This is the one from mail.com --> customer. This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: xxxxxxxxxxxxxxxx@xxxxxxxxxxxxxxxxxxxx...

Hi All, When I'm trying to email several customers on my plesk server I get bounces back from mail.com and facebook. They state: This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a...

No not yet. Only thing I see is that when I telnet to the server from linux it is working fine, but as soon as I telnet from my desktop (windows) it doesn't understand any commands. Maybe this is one of the reasons but I'm not sure. I only have this issue with a couple of contacts.

Hi Peter, Yes, I have a valid SPF, HELO domain matches and PTR record. Its just that the remote server does a callback and cannot verify that my FROM address exists which results in a failure.

Hi All, I'm getting some bounces from customers when I'm mailing towards them, also the other way arround. They get bounces when mailing me. Remote Server returned '550 Recipient verification failed I have investigated this issue but cannot find the problem. It seems my email address does...