Sorry, i'm very new on this forum :oops:
I paste all this below.
(i have changed domain name and IPs)
IN the mail.log, i have for my ip when i try :
Mar 20 16:22:47 mailcdc courier-imapd: TIMEOUT,
[email protected], ip=[::ffff:88.115.21.28], headers=1728, body=50018, rcvd=501...