What does this email mean?

Transcript of session follows.

Out: 220 mail.mydomain.com ESMTP Postfix (Debian/GNU)
In: EHLO mx3.pop.pl
Out: 250-mail.mydomain.com
Out: 250-PIPELINING
Out: 250-SIZE 10240000
Out: 250-VRFY
Out: 250-ETRN
Out: 250-STARTTLS
Out: 250-AUTH PLAIN LOGIN
Out: 250-AUTH=PLAIN LOGIN
Out: 250-ENHANCEDSTATUSCODES
Out: 250-8BITMIME
Out: 250 DSN
In: STARTTLS
Out: 454 4.3.0 TLS not available due to local problem
In: MAIL FROM:<>
Out: 250 2.1.0 Ok
In: RCPT TO:<[email protected]>
Out: 550 5.1.1 <[email protected]>: Recipient address rejected: User
unknown in virtual mailbox table
In: QUIT
Out: 221 2.0.0 Bye

 

Your system doesn't know [email protected]. Did you set up a mail account for this user?

 

So does that mean that someone tried to send an email to a fake address at my domain...I wasn't doing anything with the server or testing any email accounts when this email was sent to the root user address.

 

But wasn't that you trying to manually send a mail?

 

no...that's why I was wondering what the email sent to the root email address was for. Did I get hacked...or is it something else?

 

No, it doesn't mean that you got hacked. I guess someone tried to send a mail from the outside, maybe a spammer who was looking for open relays.