I'm having problems sending e-mail from websites hosted on my windows server. They seem to be sent without problems to most domains, but sometimes they are just stuck in the queue.

Any Ideas of what could be wrong? I read something about that the DNS should be configured correctly for some e-mail servers to accept the mails. I don't have much experience of windows servers so any help would be highly appreciated!

Thanks,
Johan

If some are getting through and others are not, I figure it's a DNS resolution issue. Make sure you can do nslookup on domains which are stuck.

When I do nslookup I receive:

Server: nsc2.ev1servers.net
Address: 67.15.31.131

Non-authoritative answer:
Name: xxxxxx.com
Address: xxx.xx.xxx.xx

Any Ideas?

Unfortunately, no. YOu need to see if you can look into IIS SMTP queue and get more detail messages. You could also check the event log and see if any detail messages are in there.

If all else fails, check the return receipt that the SMPt server is creating to see if that tells you the error why the SMTP server can't send mail. If the remote server isn't responding, try telnetting to the SMTP port (25) to verify that the port is open.

In the IIS SMTP settings put your email address to get the non-delivery reports. Those emails will tell you why the messages are failing.

sc