[ale] mail headers question

[Joe Steele]

On Sunday, August 29, 2004, Geoffrey wrote:
> Joe Steele wrote:
> > For Earthlink to say that the message is rejected because "Dynamic
> > IPs/open relays blocked" can only mean that they didn't want to do
> > business with the 1and1 SMTP server.  It had nothing to do with the
> > unseen message content.
>
> That's interesting, I think I'll try sending email from my speedfactory
> based domain through 1and1 and see if I get the same results.

I predict that 1and1 will reject the message saying they don't relay.  
See, speedfactory's servers will accept messages from you regardless 
of sender address because they recognize you as their customer by 
your IP address (they are your ISP).  In contrast, 1and1's method of 
recognizing you as a customer (because they are not your ISP) is by 
inspecting the sender e-mail address; change the sender address to 
something they don't recognize, and they will likely bounce the 
message.

--Joe