Meng Weng Wong wrote:
I consider this a bug in 2821. I don't know the reasoning that went
into it but I think that text needs to change.
FYI
http://cr.yp.to/smtp/helo.html
"A few servers reject messages from clients whose HELO parameters do not
match the results of PTR lookups on their IP addresses. This behavior is
a disaster in practice; surveys in 1998 found that more than 10% of all
clients by volume use invalid HELO parameters. Compuserve reportedly
uses unqualified names:
HELO NIH2WAAF
RFC 1123 prohibits HELO-based rejections."
Internet surveys:
http://cr.yp.to/surveys.html
z2
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