Den 27. jan. 2016 07:30, skrev Steffen Kaiser:
On Wed, 27 Jan 2016, voytek@sbt.net.au wrote:
I have a domain with about 50 mailboxes, server is located here in AUS but most of the users are on a LAN is SEAsia location. They were using POP (with Thunderbird), I suggested then can use IMAP instead, so they did.
now they are asking;
"Looks like Imap is adding a lot to our internet bandwidth"
I guess they have some bandwidth limitation on their link
which limit(s)?
I think I can understand that IMAP would increase bandwidth requirement, didn't expect it to cause 'problems'
is there any optimization or changes I can make to reduce that ? the b/w limitation are at the client LAN link
any other suggestions ?
Do they have problems more while sending or more while reading or more when doing "flagging, moving, deleting"?
Sending bandwitdh can be reduced by using BCC instead of the IMAP append to the sent mailbox. Reading bandwidth should not change, unless they watch really many mailboxes.
-- Steffen Kaiser ... but of course re-configuring mail-client will cause all mail that is still on the server to be re-down-loaded. Did you specifically ask if bandwidth problems persisted after the first connections ? Might take quite a while if there is a lot of mail. Might be "on demand" when entering a mail-box for the first time. If mail comes pre-sorted into mail-boxes, watching several mail-boxes for new mail might be a long-term "pessimization" (opposite of optimization) .