Firstly hope I have the right forum as I am a system administrator of the company I work for.

We have a new installation of Zimbra 8.0.2 on a CentOS6_64 install.

We have previously had Zimbra running successfully but never with ZCO, always using either web portal and/or iMap in Thunderbird client. There error is as follows:

Error: This message could not be sent.

Subject: Specials

To: example@example.com.au

Note: File Upload Fault. Please contact your system administrator regarding maximum message and attachment sizes.

Error Code: 413

Error Text: Message is too large

Note: A copy of message is saved in Draft folder without attachments.

Deleted attachments:

Chicken Thigh Fillet Steaks Skin Off $6.99kg.JPG

Chicken Breast Skin On $6.99kg.jpg

Lamb Legs $6.99kg.jpg

Spanish Choriso $11.99kg.jpg

Boned and Rolled Pork Roast $5.99kg.jpg

Premium Scotch Fillet Steak $15.99kg.JPG



None of these images are large in size and we are unable to find the source of this problem...

[zimbra@mailhub root]$ zmprov gacf | grep zimbraMtaMaxMessageSize
zimbraMtaMaxMessageSize: 30720000
[zimbra@mailhub root]$ zmprov gacf | grep zimbraFileUploadMaxSize
zimbraFileUploadMaxSize: 524288000
zimbraFileUploadMaxSizePerFile: 2147483648

From what we can find there should be no issue here but we have limited knowledge regarding this and how to trouble shoot this error.

All help is appreciated,