You are confusing servers with *domains*. It's perfectly acceptable that an outgoing mail server not accept incoming mail but the issue here is whether is it is valid for a *domain* to be "send-only".
It's an interesting question. For DSN's to work, you need to accept email for that domain. But is it allowed, in the rfcs, to be a "send-only" domain (no MX record) even if that means DSN's cannot be delivered? good question. -lee On 2/23/2011 12:51 PM, Michelle Konzack wrote: > Hello Henry | Security Division, > > Am 2011-02-23 13:50:19, hacktest Du folgendes herunter: >> This is also very interesting, Michael: >> >> (From the RFC link I sent before) >> >> Being able to detect domains that never accept email offers many >> resource savings to an SMTP server. In the first instance, it can >> choose to reject email during the SMTP conversation that does not >> present a deliverable 2821.MailFrom domain. > Then you will reject Mails from nearly ANY big ISPs because they have > seperated OUT-BOUND and IN-BOUND servers... > > Ans OUT-BOUND servers will not receive mails. > > Thanks, Greetings and nice Day/Evening > Michelle Konzack >
