[Dovecot] Thunderbird slow in talking with dovecot IMAP AND to sendmail

[Charles Marcus]

On 2011-10-25 6:14 AM, Linda Walsh <dovecot at tlinx.org> wrote:
> and everyfrackin' body was using 4K packet sizes (at the application
> level!, the window size on TCP was over 64K...but no one was using
> it)....especially galling with my network's MTU at 9K, BTW, because
> small packets are really bad on a 1Gb network.
>
> sendmail -- 4K,
> dovecot /ssl, 4K...
>
> wazzup .. is t-bird forcing this,

If I'm not mistaken, yes, this is (or could be) a TBird problem... I 
can't find the bug report where this was discussed, but I distinctly 
remember one of the devs commenting on this 4k packet size issue. 
Apparently it was an intentional change, but he couldn't figure out why.

Fyi, it was discussed in one of the IMAP performance bugs...

-- 

Best regards,

Charles