Extreme Networks Altitude 4700 Series Product Reference Manual page 242

Configuring Access Point Security
3 Configure the SMTP field to disable or restrict specific kinds of network mail traffic.
Block Outbound
SMTP Commands
242
Simple Mail Transport Protocol (SMTP) is the Internet
standard for host-to-host mail transport. SMTP generally
operates over TCP on port 25. SMTP filtering allows the
blocking of any or all outgoing SMTP commands. Check
the box next to the command to disable that command
when using SMTP across the access point's WAN port.
• HELO—(Hello) Identifies the SMTP sender to the
SMTP receiver.
• MAIL—Initiates a mail transaction where data is
delivered to one or more mailboxes on the local server.
• RCPT—(Recipient) Identifies a recipient of mail data.
• DATA—Tells the SMTP receiver to treat the following
information as mail data from the sender.
• QUIT—Tells the receiver to respond with an OK reply
and terminate communication with the sender.
• SEND—Initiates a mail transaction where mail is sent
to one or more remote terminals.
• SAML—(Send and Mail) Initiates a transaction where
mail data is sent to one or more local mailboxes and
remote terminals.
• RESET—Cancels mail transaction and informs the
recipient to discard data sent during transaction.
• VRFY—Asks receiver to confirm the specified argument
identifies a user. If argument does identify a user, the
full name and qualified mailbox is returned.
• EXPN—(Expand) Asks receiver to confirm a specified
argument identifies a mailing list. If the argument
identifies a list, the membership list of the mailing list is
returned.
Altitude 4700 Series Access Point Product Reference Guide