Multiple inbound copies of message spooling

[SkullCo]

I have a customer with about 30 e-mail users in their office. On occasion when one of them tries to send a message from Microsoft Outlook, it creates dozens of connections to the incoming queue, all with zero bytes received. This clogs up the queue with 40-50 incoming messages, all 'spooling'.

It seems to occur randomly, with the same 5 or 6 users, and all from the same office. Most of the time everything works normally but this problem arises periodically. They are running different versions of Outlook, and I have reset their accounts in Outlook, however the problem still occurs.

Any suggestions on what is causing this and how to correct it? Thanks.

[MailEnable-Ian]

Hi,

Sounds like client side Antivirus software. Disable any Antivirus virus email scanning proxies on the client machine and try again. Alternatively configure the MailEnable server to listen on an alternative SMTP port like 2525 and then configure the client machine to connect on that port for SMTP to see if the same behavior occurs.