> Hello all, > > Our Exchange server is suffering from a problem where a mail gets > delivered, but the mail sticks in the IMS's 'Outbound mail awaiting > delivery' queue with '(host unreachable)' next to it. > This results in the IMS retrying to redeliver the mail at the set > intervals and the somewhat annoyed recipient receiving multiple copies of > the mail until it expires. > This only happens occasionally - most mail goes out fine. I have noticed > that is does happen to one email that gets sent regularly from one of our > users to an external mailbox. > I have tried using nslookup from the server and can telnet in to port 25 > of the other servers without a problem. > > Our box is set up as follows: > > NT4, Sp6a, PIII, 3 processors, 1gb mem. > Exchange 5.5 sp4 (configured as per Q181420 - 'How to Configure Exchange > or other SMTP with Proxy Server') > Network Associates GroupShield (Antivirus Server Extension: 4.5.572.171 & > Server Admin Extension: 4.5.572.128) > Network Associates Netshield 4.5.0 (with the recommended Exchange > directories excluded from scanning). > > I also had the Network Associates Message Body Scanning tool installed but > thought this might have been contributing to the problem so I removed it a > few months ago, but the problem sill continues. > > Any ideas? > > Many thanks, > > Daniel. > > This e-mail may contain proprietary and confidential information, and is intended for the named recipient(s) only. If you are not one of the named recipients, then disclosure, distribution, copying or printing of this e-mail is strictly prohibited and it must be deleted. Additionally you should notify the sender of the distribution error. Heal's will not accept any liability or responsibility for the completeness or accuracy of its contents and attachments.
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