Webone blocking port 25??

[Alfred]

It probably does the rejection AFTER the data because you can have an 
arbitary list of to address, some which may work and some which done. 
You only do a 550 (or any 5xx) code on fatal errors.

Martijn van Oosterhout wrote:
> On Fri, Jul 26, 2002 at 10:47:47AM +1000, Alex Satrapa wrote:
> 
>>On Friday, July 26, 2002, at 09:31 , Jeremy wrote:
>>
>>>They do, of course, authenticate relaying by IP, but also by valid 
>>>domain name.  The interesting bit is that they don't give an SMTP error 
>>>when they do so.  They acept the mail then drop it later.
>>
>>Ahh... now *that* is something to get on their back about.  That's 
>>definitely not what I would expect.
> 
> 
> Strange. Exim definitly verifies it while receving the message
> (receiver_try_verify and sender_try_verify if you're interested) and will
> reject the message by returning a 550 *after* having received the DATA. If
> you don't check till later, you have the problem of sending a bounce message
> because the from address was, uh, fake :)
> 
> 220 sambucca.ecomtel.com.au ESMTP Exim 3.35 #2 Fri, 26 Jul 2002 12:00:41 +1000
> HELO kleptog
> 250 sambucca.ecomtel.com.au Hello malibu.ecomtel.com.au [210.9.56.6]
> MAIL FROM: martijn at fake.mail.address
> 250 <martijn at fake.mail.address> is syntactically correct
> RCPT TO: whhaat at also.fake.address
> 250 <whhaat at also.fake.address> is syntactically correct
> DATA
> 354 Enter message, ending with "." on a line by itself
> message
> .
> 550 rejected: cannot route to sender <martijn at fake.mail.address>
>