Re: [Exim] forged HELO/EHLO addresses

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Szerző: Dominik Ruf
Dátum:  
Címzett: exim-users
Tárgy: Re: [Exim] forged HELO/EHLO addresses
* Simon Bell <aooi58@???> [2003-11-10 16:53]:
> What do the rfc's say about this? Is it required that an mta has a
> non-forged helo/ehlo


Yes.

RFC 1123

| 5.2.5 HELO Command: RFC-821 Section 3.5

|
| The sender-SMTP MUST ensure that the <domain> parameter in a HELO
| command is a valid principal host domain name for the client host.


> and do rfc's allow a mail to be rejected for this reason?


No.

| [...]
| However, the receiver MUST NOT refuse to accept a message, even if
| the sender's HELO command fails verification.


Dominik