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Exchange 5.5 event errors.

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by m.r.

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I'm getting an Event 2018 in me Exchange log when I send from hotmail to it. Transfer Out of Gateway to the Private is in the details with a 0x80004002. At one time we had hotmail as blocked domain in the IMS but have since removed it. I have done this with other domains and not had a problem. Normaly blocked domains give an IMC error in the event log. The only other info I can find on this says it may be related to AV software. I've already seen the MS KB on this and we are on the latestSP already.

2 replies

by carol

Not sure about this, but I'm wondering if you're behind a proxy or firewall. If a Proxy Server, does the Proxy server have any restrictions on the hotmail domain? Interested in hearing the result of this situation.

by m.r.

I'm not Proxy filtering. Firewalls are not set to block Hotmail. Hotmail works over HTTP just not receiving SMTP mail. This was my first thought as well but since the mail is reaching the Exchange server enough to get the 2018 error then I assumeSMTP is touching it. If Hotmail were completely blocked I wouldn't get the error. My next guess was that Hotmail does some sort ping to prevent relaying but haven't been able to prove that yet. LDAP is blocked but shouldn't be reachable by Hotmail anyway. I know they are hot on SPAM right now and we receive fine from other domains. Lastly there is no NDR at the Hotmail account although if some strange port is required this might not happen. Thanks for the input.

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