When we receive an email with attachment and open the email in Thunderbird, Thunderbird always download the attachment when opening
Thinking that it may be a Thunderbird issue, we looked into Thunderbird
settings and found mail.imap.mime_parts_on_demand and mail.imap.fetch_by_chunks options which would supposedly resolve the
problem of downloading attachment when opening the mail, but they didn't.
Then we tested Thunderbird with a Sendmail/Imap-uw server and Thunderbird
did not download the attachment when opening the mail.
1) Does Zimbra's IMAP server support 'fetching of message body in chunks'?
2) Does Zimbra's IMAP server support 'fetch only part of the body which will be displayed inline'?
The Thunderbird details.
Found out this http://web.archive.org/web/200410241...9981005-3.html
mail.imap.fetch_by_chunks Bool true
Whether or not the client tries to fetch message bodies in chunks,if the server
supports it (IMAP4rev1). If false, it tries to fetch the whole body in a single
mail.imap.mime_parts_on_demand Bool true
Whether or not the client will try to request the BODYSTRUCTURE for a message
when over a certain size threshold, and attempt to fetch only the parts of the
message that will be displayed inline. Some servers may not handle this
correctly (Exchange 5.5 may crash if pre-SP2), so turn this off as a workaround.