AW: Re: AW: Re: using the character @ in the local part
- Please try again using the telnet command on a different machine than localhost.
On localhost I get the same result as you.
Am 03.01.2013 17:45 schrieb Wietse Venema <wietse@...>:
> <span style="font-family:Prelude, Verdana, san-serif;">Can't I reportYour test was invalid.
hostname# postconf resolve_dequoted_address=no
hostname# postfix reload
postfix/postfix-script: refreshing the Postfix mail system
hostname# telnet locahost smtp
Connected to localhost.
Escape character is '^]'.
220 hostname.example.com ESMTP Postfix
250 2.1.0 Ok
250 2.1.5 Ok
On my system the local delivery agent translates this "postmaster".
I could look into that later when I have time, but I suggest that
you refrain from using special characters in address local-parts.
- Michael Blessenohl:
> The security issue is, as far as I understand, that a backup MX uses anCome on, don't be so naive. The backup MX scenario is an EXAMPLE
> @ in the local part for internal purposes. Which, in theory, can be
> exploited to use the server as open relay. As long as I don't use a
> backup MX, I don't have an open relay and everything is fine, isn't it?
of how @ in local-part can result in trouble. The same problem may
happen in ANY piece of software that decisions based on the content
of an email address.