Our Mac Mail users can no longer send out messages with attachments larger than around 1 MB. Webmail works fine. This started around the time we upgraded to 7 over a month ago. Our config is set up to allow up to 30 MB.
When sending via Mac Mail, the user gets a popup at the end that asks if they want to try another server. It acts like it is uploading the attachment and takes about as long as it should depending on the connection speed and size.
I have tried to sort through zimbra.log but it is massive and I am having a hard time determining if the attempt to send ever hits the logs.
Any help troubleshooting this is appreciated.