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The Skip Countries (SKIPC) ESMTP extension specifies
that a message should not be transmitted through certain countries.
The name of the Skip Countries service extension
is "SKIPC".
The EHLO keyword value associated with this extension
is"SKIPC".
A new SMTP verb "SKIPC" is defined. The SKIPC verb
should be specified before any RCPT-TO verb for a particular message,
and is valid for this message only. The syntax of the SKIPC verb is:
skipc = "SKIPC" ":" domain *(" " domain)
domain = domainpart *("." domainpart)
Example to stop a message from passing Russia or
Siemens in Germany:
S: <wait for connection on TCP port 25>
C: <open connection to server>
S: 220 dbc.mtview.ca.us SMTP service ready
C: EHLO dsv.su.se
S: 250-dbc.mtview.ca.us says hello
S: 250
C: SKIPCC:
C: MAIL FROM:<jpalme@dsv.su.se>
C: SKIPC:ru siemens.de
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