Command out of sequence

Sender OK

No valid recipients specified

Send your message

 not known

User 

Error getting mail drop

 known

User 

Forwarding to 

Unrecognised command

 bytes available)

Not enough space in users account (

 bytes

Account limit is 

Users account disabled

Unrecognised keyword

Syntax error, no >

Syntax error, no <

HELO or EHLO command expected

 hello 

Message received OK

 bytes available for 

Not enough space, only 

 bytes for 

Account limit is 

Error receiving message

 bytes available)

Not enough space on server (

 running 

 closing connection

NOOP OK

This is not a mailing list

Error opening mailing list

Connection reset

User not local

User not known