Re: [exim] A riddle: What HELO/EHLO does remote host send?

Alexander Shikoff wrote:
> Thanks a lot! I've understood: some spammers ignore 550 code at HELO stage.
> I've made additional check in RCPT ACL.

You could enforce the use of helo at mail time. Do your deny at helo time,
then deny at mail time if helo is blank.

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