Hi,
Are you using mboxes or Maildirs? I am using XMail v1.27 with Debian 7
on ext4 filesystem. May be its filesystem's bottleneck but XMail does
calculate directory size on every RCPT (I looked into the codes) and
causes CPU spike, which isn't a right thing I feel.
-Akash
On 2015-10-22 19:
I use XMail in some customers servers and they have big mailboxes, but
don't have such problem.
What XMail version are you using? What OS and filesystem type?
I use XMail 1.27 on Slackware 13.37 64bits with reiserfs.
How maildir works with a file per message, reiserfs is very nice to handle
large n