what IMAP server?
IMAP4rev1
And implementation?
What time does your login take - (FF YSlow plugin and others)?
Nothing plugins
Rephrased - how long does it take the login pages to load? The Firefox YSlow plugin can assist timing this event.
What time does a straight IMAP login take?
Rephrased - how long does a IMAP login take using a non-roundcube client?
Are there any web server, RC or IMAP logs containing timing info/errors?
Look at the logs of these and work out where the slow points are. Is the program spending 5 seconds fetching IMAP data or is there some DNS timeout on which server and it reverts to a secondary entry.
Perhaps Xdebug profiler would help.
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