Error sending an email - Delivery Failure

[MMock]

A sales agent in my office tried to send an email and got this error. I googled the error, and there were no hits! (That's never happened to me before - I'm usually not that original!) Does anyone know what this error means or where I should start digging?

Could not deliver message to the following recipient(s):

Failed Recipient: [email protected]
Reason: Remote host said: xxx x.x.x Your server IP address is in the UCE
layer 1 database, bye

(The x's were more realistic values in the real error, not sure if I'd be revealing anything I shouldn't if I didn't x-them out).

Thanks for any help.

[abhijit]

uce - unsolicited commercial e-mail


That's all I know.

[abhijit]

I found this article, which might prove useful.

[MMock]

So that means something on their end won't accept it because it's unsolicited? Is there something we can tell them to do to let this in - because this is a customer the sales agent contacted and the email was a follow-up. Oh, if the intended recipient emails the sales agent first, will the sales agent be able to successfully reply?

Thanks.

[MMock]

I found this article, which might prove useful.

I'll look at it, but in the meantime I cross-posted, sorry...

[abhijit]

I can think of a couple of options.

The IP you're using is classified as SPAM. So either their email address needs to move your IP to a safe filter list
OR
You need to get another ip address to send out mails.

[chris128]

(The x's were more realistic values in the real error, not sure if I'd be revealing anything I shouldn't if I didn't x-them out).

Nah they would just be the SMTP response codes, I'm guessing it started with a 5?

Anyway, I would do a blacklist check on your external IP address / DNS address and see if you are on any well known black lists - this is a fairly decent free one: http://www.mxtoolbox.com/blacklists.aspx
If that all comes back clean then I would just try to contact the company you are sending the email to and ask them to add your domain to their white list / safe senders list.