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Re: Max. no of allowed "rcpt to" commands in a smtp session?

2001-07-07 21:18:57

Spammers always use weakness of smtp protocol. For example yahoo can
accept any mail form any client. They do not check if the sender is an
SMTP server and it's MX record to be ensure that sender's domain and
IP belongs to right smtp server that has a MX record.

since there's no protocol requirement that an SMTP be both a client and 
a server on the same IP address, such a check would be tremendously
stupid and misguided.