I am afraid that this is an off topic, however I was hoping that
someone could clarify on the SMTP standards (so RFC2822) and trailing
dots in a DNS name during a helo statement.
E.g.
gray on platinum1>nslookup -type=mx msn.com
Server: heinlein.cambridge.scr.slb.com
Address: 134.32.101.2
msn.com preference = 20, mail exchanger = smtp-gw-4.msn.com
smtp-gw-4.msn.com internet address = 207.46.181.13
gray on platinum1>telnet smtp-gw-4.msn.com 25
Trying 207.46.181.13...
Connected to smtp-gw-4.msn.com.
Escape character is '^]'.
220 cpimssmtpa19.msn.com Microsoft ESMTP MAIL Service, Version:
5.0.2195.4617 ready at Wed, 2 Jan 2002 04:10:43 -0800
helo platinum.cambridge.scr.slb.com.
501 5.5.4 Invalid Address
helo platinum.cambridge.scr.slb.com
250 cpimssmtpa19.msn.com Hello [134.32.101.3]
quit
221 2.0.0 cpimssmtpa19.msn.com Service closing transmission channel
Connection closed by foreign host.
gray on platinum1>
Normally in DNS a trailing dot forces the resolution to start at the
root, so URLs like
http://www.exim.org./
are valid.
Is it legal for an MTA to send the trailing dot in a helo statement,
or can the receiving MTA legitimately reject the statement?
Thanks,
Douglas.
--
================================
Douglas GRAY STEPHENS
Global Infrastructure (Directories)
Schlumberger Cambridge Research
High Cross,
Madingley Road,
Cambridge.
CB3 0EL
ENGLAND
Phone +44 1223 325295
Mobile +44 773 0051628
Fax +44 1223 311830
Email DGrayStephens@???
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