After some trouble for configuring virtualmin webmin usermin, everything is ok now.
I’ just have a question. courierpop3dsizelist file has been automatically created in Maildir folder. Is it normal? and can i delete it?
We don’t know. We don’t use Courier here. We like Dovecot.
You’ll need to dig up a Courier support forum and see what they have to say about it. But I’d guess that if Courier created the file, it probably wants it to be there, so I wouldn’t go deleting files I didn’t understand. That said, if it’s anything like Dovecot, it’s probably just a cache file, and probably can safely be deleted–but it’ll be regenerated next time someone connects.
Why do you want to delete it?
Heheheh! Good excuse.