Answer
GMS Secure Socket Layer has returned an error to the remote server’s VRFY command because the command was not formed correctly.
In this case, session Undefined is processing a connection from Undefined. The remote server gave the SMTP command
Undefined
GMS rejected the command with
502 Syntax error, missing space.
This will not cause GMS any problems. This problem is most likely to be caused by someone who is attacking your system to attempt to find a weakness. If you wish to find out more, you will need to contact the owner of the remote system.
See Also:
- How do I contact the owner of a remote server?
- What is the SMTP VRFY clause?
- What is SMTP Response Code Theory?
- How do alerts work?
- How do I contact the owner of a client?
Keywords:VRFY syntax error attack 8102