*Secondary SMTP relay server not sending mails. RRS feed

  • Question

  • User-2062540605 posted

    Hi team

    Recently i have configured two smtp relay server on my environment. Both are running in server OS 2019 and both server are in same domain but in different location.

    i am getting mail through one SMTP replay server and not through second smtp relay server. we have opened ports and checked in network part and there is no port blocked . i have reconfigure the server and still mails are in the bad mail folder.

    Diagnostic-Code: smtp;553 #5.1.8 Domain of sender address <> does not exist

    no idea where is the problem

    Wednesday, October 21, 2020 9:00 AM

All replies

  • User-848649084 posted


    Your form address's domain doesn't exist (it has neither an A record nor an MX record), that's why it's getting rejected.

    Add an MX and/or A record for that subdomain and your issue will resolve.

    You could try to use nslookup to check if the server sees the DNS records:

    nslookup -type=mx walkingtree.in
    dig walkingtree.in MX

    Thursday, October 22, 2020 6:50 AM