[gpwilkinson]

We are running BES 4.1.6 on Lotus Domino 8.0.1 and Windows 2003 R2 Enterprise Server.

We upgraded from BES 4.1.5 to BES 4.1.6 last month (a couple of days after it was released). For the last three weekends (once on a Friday evening and twice on a Saturday evenings), emails to @MOBILEEMAIL.VODAFONE.NET get stuck in mail.box whilst all others emails to other domains are delivered successfully. Restarting the Lotus Domino Router tasks then will deliver all the stuck emails.



This is from the Lotus Domino Mail Routing Log for a successful email delivery:

09/08/2008 19:30:03 Router: [0000000B] Transferring mail to domain MOBILEEMAIL.VODAFONE.NET (host vodauk.mx1.eu.blackberry.com [216.9.253.35]) via SMTP
09/08/2008 19:30:04 Router: Transferred 1 messages to MOBILEEMAIL.VODAFONE.NET (host vodauk.mx1.eu.blackberry.com) via SMTP



This is from the Lotus Domino Mail Routing Log for a unsuccessful email delivery:

09/08/2008 19:44:29 Router: No messages transferred to MOBILEEMAIL.VODAFONE.NET (host MOBILEEMAIL.VODAFONE.NET) via SMTP: SMTP Protocol Returned a Transient Error



We have been running Lotus Domino 8.0.1 for over six months (even though it wasn't supported with BES 4.1.5) and no other changes have been made to the server. So, my question is is it a coincidence that the mail routing problem has started since we upgraded to BES 4.1.6 or what could be the cause of the problem?



I've had a look at the BES logs and there doesn't appear to be any errors when this occurs.



Thanks!