OK, the solution turns out to be trivial, (however it caused big inconvenience for me).

If your evolution didn’t get mails properly, make sure it’s not marking all incoming mails as ‘Junk’.

For me, it’s ‘Edit’ => ‘Preferences’ => ‘Mail Preferences’ => ‘Junk’ => ‘Check custom headers for junk’, and this custom list contains:

Header	Contains Value
X-Spam-Flag	YES
X-Spam-Level	*****

Days ago, evolution stopped fetching mails (gmail, pop3), but gmail’s web interface is all ok. I suspected google since there happened to be rumors about google servers at that time. And I suspected evolution too, since not long ago I experienced a problme with it.

Then it turned out to be the mail filter. I installed bogofilter to fix the ‘Check junk failed’ problem, but the configuration somehow messed up and it thought all the mails are junk.

Maybe it’s a problem of Foresight packaging?