Failure to receive email from a couple of customers

HCL Domino Domino Forum
1

We have a couple of customers whose emails cannot be received at our server. They said they can send their emails to other customers except ours implying the problem at our end. We can receive emails from other customers except those a couple that leads us to believe the problem at their end. Is there any procedure to identify the problem at which end so the party can focus on fixing the issue rather than pointing the finger to each other without solving the issue.

Thanks and regards,

Scott

2

Subject: debugging

You and the senders need to look at the details of the smtp conversation. Use the SMTPDebug parameter to get what the Domino server sees:

http://www-01.ibm.com/support/docview.wss?rs=463&uid=swg27003007

However, if the sender is just dropping you because it doesn’t like what it sees, the problem might have to be tracked at the sender.

One possible cause for this is that the sender requires a ‘reverse DNS’ entry for your server, and you don’t have one. Another that I’ve seen occasionally is the sender requiring that the host name in your MX record match the host name announced in the SMTP conversation.

3

Subject: Debugging

Stuart,

Thanks for your advice. I will add debugging to check for details.

As you mentioned “reverse DNS” and the host name in your MX record match the host name announced in the SMTP conversation, our DNS server is located at our ISP. Could you please give me more detail to check it with them.

Thanks and regards,

Scott

4

Subject: reference

hope this helps: