Explanation:
Specifies whether the SMTP task requires inbound addresses that appear in
MAIL FROM commands or RCPT TO commands be properly formed according to the
RFC821 standard (must contain <>):
0 (default) - Does not enforce 821 standard
1 - Enforces 821 standard
Inbound messages that do not conform to RFC821 fail in protocol, the MAIL
FROM command fails, and the sending SMTP client sees the failure.
Examples of failure, when set to 1:
mail from:<bob>
501 Syntax error, parameters in command "mail from:<bob>" unrecognized
or missing
mail from:bob@acme.com
501 Syntax error, parameters in command "mail from:bob@acme.com"
unrecognized or missing
Example of success, when set to 1:
mail from:<bob@acme.com>
250 bob@acme.com... Sender OK
Note: It is not possible to forbid MAIL FROM:<>, which is
required by the RFC for Non-Delivery Reports and Delivery Status Notifications
to prevent looping.
Applies to:
Servers
Default Value:
0
UI Equivalent:
None
Syntax:
SMTPStrict821AddressSyntax = value