Email has stopped coming through

[rsthomas]

After years of the successful operation of my inhouse Sentora server and third-party managed DNS service (https://freedns.afraid.org), emails are no longer being received into MS Outlook Express. I can send, but not receive.

This is affecting ALL email accounts from several domains.

From Outlook, if I test an account both Incoming and Outgoing pass with no errors, so the problem has to be somewhere on the Server.

Someone had suggested a potential problem revealed at https://intodns.com/rstmarine.com with an MX record setting:
MX name validity
The MX records that do not seem valid hostname:
mail.rstunlimited.company
This can cause problems
but, 1.) I don't know how to make a "valid hostname," and 2.) it has been like this for years.

It is worth $100 US to me in order to get this fixed.

Do I need to reinstall Postfix, Dovecot, Roundcube, or anything else?

If there is one or more log files I can look at, please be specific as to their location.

Since I cannot receive messages sent to my registered Sentora Forums account, please forward replies to rsthomas@gmx.com. Meanwhile, perhaps an administrator can change the email address for me!

[fearworks]

Hi,

There could be several different issues causing this and it's difficult to diagnose without more info.

Perhaps you could use the following sites to get a diagnosis and then report back with the results:

https://www.mail-tester.com/
https://ssl-tools.net/mails

If you are able to set up a temporary email address for me to try to see the issues in practice it might also help - feel free to send a username and password to me in a private message (something like temp@rstmarine.com).

Your server's IP address is listed in a few blacklists so that could also be the issue, but again having the ability to use a test account on your server is probably the quickest most effective way to start an analysis.

Keith

[rsthomas]

Hi,

There could be several different issues causing this and it's difficult to diagnose without more info.

Perhaps you could use the following sites to get a diagnosis and then report back with the results:

https://www.mail-tester.com/
https://ssl-tools.net/mails

If you are able to set up a temporary email address for me to try to see the issues in practice it might also help - feel free to send a username and password to me in a private message (something like temp@rstmarine.com).

Your server's IP address is listed in a few blacklists so that could also be the issue, but again having the ability to use a test account on your server is probably the quickest most effective way to start an analysis.

Keith

I tried to send the Private Message, but:
Please correct the following errors before continuing:
fearworks has private messaging disabled. You cannot send private messages to this user.

[fearworks]

That would indeed help and I have changed that setting now.
Keith