Resolved Unable to send & receive emails after Dist Upgrade & DNS changes

[Johnny9977]

Server operating system version

Ubuntu 22.04

Plesk version and microupdate number

18.0.64

Hi,

I have a big problem. Last night we've upgraded from Ubuntu 18.04 to 20.04 and 22.04 which worked. Also, this morning we have changed the DNS settings for our domain from an A-Record to NS-Records because we want to use the Plesk DNS instead. We're able to reach our websites again, but unable to send any mail. We've tried disabling SPF & DMARC, but the issue still persists. Likewise, we also did MX lookup checks and DNS propagation checks, which seems to be okay. Also, reverse DNS is configured correctly.

This is the error we get when we try to send a mail:
Sep 21 17:39:51 plesk postfix/smtp[38227]: 150C8A029C: host mx-ha02.web.de[212.227.17.8] said: 451-Requested action aborted: local error in processing 451 For explanation visit 451 Nemesis ESMTP Service not available Requested action aborted: local error in processing (in reply to MAIL FROM command)

When we emailed our address, we get an undeliverable response:

InvalidRecipientsException: Invalid recipients were provided for the message: '4115' (451-Requested action aborted: local error in processing
451 1MQxs3-1sdPjW3O4N-00SwiL
). --> Unexpected SMTP server response. Expected: 250, actual: 451, whole response: 451-Requested action aborted: local error in processing
451 1MQxs3-1sdPjW3O4N-00SwiL

Failure code: 43bf

So whatever we do, we can not get this thing back to its original state — fully working with SPF and DMARC. Any idea what we can do? We've tried the plesk repair tool for DNS and email which had no impact fixing our issue.

This is our IP: 176.9.84.24
This our domain: enwikuna.de

We would be very glad for any help due to our downtime. We can not serve our customers this way.

 

[scsa20]

Did you checked the logs on the server? Made sure that the services are running? As far as I can see the DNS is configured right and is more likely a services problem at this point so making sure that the SMTP service is running and checking logs will be a good starting point. You could also try running

plesk repair mail

to try to repair just the mail aspect or

plesk repair installation

to try to repair the whole installation and see what happens. Also check your firewall rules.

 

[Johnny9977]

Hi, the plesk repair did the job. Thanks a lot!