|Title:||Check if Mailserver answer to VRFY and EXPN requests|
|Summary:||The Mailserver on this host answers to VRFY and/or EXPN requests.|
The Mailserver on this host answers to VRFY and/or EXPN requests.
VRFY and EXPN ask the server for information about an address. They are
inherently unusable through firewalls, gateways, mail exchangers for part-time hosts, etc.
Disable VRFY and/or EXPN on your Mailserver.
For postfix add 'disable_vrfy_command=yes' in 'main.cf'.
For Sendmail add the option 'O PrivacyOptions=goaway'.
It is suggested that, if you really want to publish this type of information, you use a mechanism
that legitimate users actually know about, such as Finger or HTTP.
|Copyright||Copyright (C) 2009 Greenbone Networks GmbH|
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