I can send email!?!?!

[Spavi]

 Hi, I'm new in Linux and my english is not good.
 Excuse me for this
 Well, the problem is:
 I have installed qmail, vpopmail, ezmlm, qmailadmin,autoresponder and
 sqwebmail
 All run, i can send emails but no email arrives.
 Maybe emails remain in queue?
 
 Please help me, thanks
 
 Bye bye
 Spavi