Hi, Hobbit - we met back in the late 80s / early 90s at various New Jersey things such as Trenton Computer Fair, but you probably don't remember me; Tigger says hi as well... "Be Liberal in what you accept, be conservative in what you send, and be really really clear in your error messages, except occasionally if you're lying to spammers." IMHO, selling somebody connectivity that blocks various ports isn't selling them Internet Service, it's selling them Walled Garden Couch-Potato Service. For many people that's ok, and if they're sending traffic on Port 25 it's only because some zombieware has taken over their PC, as opposed to because they're actually trying to send it. But the old PC on my desk upstairs has about 2500 times as much CPU and 500 times as much disk space as the Vaxen that I used to run email for a department of 30 people, and the network connection is about 300 times as fast, and there's no particular reason that it shouldn't have full end-to-end Internet presence like anybody's commercial mail server. That's different from 15 years ago when I only had dialup at home, because dialup wasn't really a full-time process, and sending mail was sufficiently unreliable that it made sense to run a dumb client at home that talked to a full-time smart host that knew how to queue messages and retry on failure. Blocking port 25 has become popular, not only with walled-garden connectivity services that are really scared of their customers running their own servers (e.g. most cable modem companies), but also with other ISPs that don't want to deal with the problems of having customers who are spamming (whether deliberate or zombified.) So anybody buying something lower-priced than a T1 typically needs to have a mail client or mail transfer agent that can use other ports, unless they want to trust their ISP's mail service or use webmail. And also obviously if you're running an outbound mail relay smarthost for your clients you need to accept mail from known people on the various authenticated ports in case they're stuck behind a randomly misbehaving ISP, and you should also support encrypted SMTP in general. In some sense, anything positive you an accomplish by blocking Port 25 you can also accomplish by leaving the port open and advertising the IP address on one of the dynamic / home broadband / etc. block lists, which leaves recipients free to whitelist or blacklist your users. And you can certainly provide better service to your customers by redirecting Port 25 connections to an SMTP server that returns "550 We block Port 25 - see www.example.net/faq/port25blocking" or some similarly useful message as opposed to just dropping the packets. I've toned down my vehemence about the blocking issue a bit - there's enough zombieware out there that I don't object strongly to an ISP that has it blocked by default but makes it easy for humans to enable. -- ---- Thanks; Bill Stewart Note that this isn't my regular email account - It's still experimental so far. And Google probably logs and indexes everything you send it.