IMAP emails with attachments slow to view

[meltingrobot]

Hi, I am having an issue where IMAP emails that have attachments are slow to download/view on Thunderbird and other places. Is there something I am missing in that when you view an email it should only show the message and not download the attachment until you click on it? I have looked all over Thunderbird's settings and the server settings. It's also slow to pull up the emails with attachments on the web interface but not as slow as Thunderbird.

Thank You

[phoenix]

That depends on whether you have Thunderbird set to download stuff for offline viewing? If you don't need offline viewing then disable that option and it shouldn't download it.

[meltingrobot]

I just checked and offline viewing is not enabled. I never turned that on, but I double checked to make sure.

[phoenix]

Is this a problem with large (1Mb+) attachments?

[meltingrobot]

The attachments I was testing with, yes.

[phoenix]

There is one thing you can try. Have a look in in the Thunderbird file mailnews.js and you'll find two entries for '......fetch_by_chunks' they should be set to true, change them both to false then save the file and restart Thunderbird. See if that has any impact on your downloads.

[meltingrobot]

That seems to speed it up a little on the LAN side, but it still acts like it's downloading the attachment with the message. When I go to save the attachment, it saves instantly, it shouldn't do that. The message should load instantly, the attachment should take time to download.

[phoenix]

Can you also check in the account Properties/Offline & Disk Space/Select folders for offline use ..... that none of your folders have this property set.

[zzzzsg]

I have the same problem.

Does Zimbra support fetch message body in chunks, etc.?

Originally Posted by phoenix

Can you also check in the account Properties/Offline & Disk Space/Select folders for offline use ..... that none of your folders have this property set.

[tbanack]

I think this should solve your problem. I'm using Thunderbird 1.5.0.10
I'm on Ubuntu right now so I can't remember if it is the same for windows or not, but if you go to:
edit -> preferences (in windows I think it is: tools -> preferences or something like that). Go to the "advanced" tab, then click at the bottom where it says "Config Editor"

now in the filter bar type in "attachments", find the entry that says:
mail.inline_attachments and double click it until the value column changes to false.

I hope this helps
Trevor