I have set up a new email account on a vps,
I can download by pop3 the emails but if i send email to that account i receive the error 'unknown user' while if i send emails by a gmail account everything works.
any suggestion? is it a client or a server problem?
the vps is a centos web server with other working email accounts thunderbird is on windows 7
i try sending email other email accounts usually working without problems.
do you need other details?