We are using ZimbraOlkConnector-6.0.5_GA_2213_6.0.5846.5 and 6.0.5 of the server as well, client has Outlook 2007.
They are trying to do a mail merge, and pretty often, for example, start around 9 for about 70 messages, and at 10 or so there are still 5 remaining. They eventually send, but it seems to take way longer than it should. This happens I think on two different machines.
I searched for Mail Merging and didn't find much with regards to bugs I don't believe - but just wondering what support there is for this, if any.
If logging is needed from the machine, please let me know how to turn it on and where it is located on the PC. TIA