I try to sync my existing imap folders to zimbra.
Almost all messages are transferred, except for ones with big attachments.

I set the limit in the admin console to 50Mb, and I can send a 12Mb attachment without a problem to Zimbra.

However, with imapsync, or drag/drop the message in evolution to zimbra, I get an error message like:
2214 BAD parse error: request too long

What is de max. imap message size, and can it be increased?