Can't receive new emails and send email from webmail

as title, my disk was full before; however, after clean up the space and reboot the os, my system cannot receive new emails and cannot send email from webmail. What can i do ?

 

can you post the errors/errorlog?

 

Jul 17 05:46:00 mailserver01 amavis[26231]: (26231-01) (!)FWD via SMTP: -> ,BODY=7BIT 452 4.3.1 TempFailed, id=26231-01, from MTA([127.0.0.1]:10025): 452 4.3.1 Insufficient system storage

 

This is my Disk info

Filesystem Type Size Used Available Use% Mounted on
/dev/sda1 ext4 9.4G 7.3G 1.7G 82% /
none devtmpfs 245M 204K 245M 1% /dev
none tmpfs 249M 0 249M 0% /dev/shm
none tmpfs 249M 344K 249M 1% /var/run
none tmpfs 249M 0 249M 0% /var/lock
none tmpfs 249M 0 249M 0% /lib/init/rw
/dev/sda3 ext4 40G 35G 3.4G 92% /var/vmail

 

http://www.expertcore.org/viewtopic.php?f=20&t=2972