Hi all, recently I migrated 200 accounts from my postfix maildir with imapsync to zimbra, all messages migrated ok, but i cant donwload attachment of some messages, i have this error when I tried to download by web:

Error Code: 500 Internal Server Error. The message includes an HTTP header or a combination of headers not compatible. (12156)

But If I like to download with Thunderbird, I can download without problem, some solution ?

Im using ubuntu 64 bits and Zimbra for 64 bits