Well, I know that if you don't have a reverse DNS entry that many will reject mail from you. I thought from your original post that you did. The "www" maybe a flag for them. Many broadband providers, for instance, will give you a static but on their DNS the IP resolves to user1.dsl.someISP.com or something. You can, however, use your ISP's smtp server as a smart host and avoid such problems as rejections like this. Because you are part of your ISP's network, it's smtp server will relay for you because to it you are local. So set your sendmail to forward all outbound mail to smtp.yourisp.com and then test your mail. This works for my setup. <<JAV>> ---------- Original Message ----------- From: Paul Gillen <gillen1951@xxxxxxxxx> To: Red Hat User List <redhat-list@xxxxxxxxxx> Sent: Thu, 13 Nov 2003 18:57:11 -0800 (PST) Subject: Fwd: Re: Mail error: reason: 550 5.0.0 You must use a valid mail server > I'm pretty sure that you're right, that RedHat is > rejecting this as a spam check, i.e. that the mailing > host should be resolvable as the message origin. My > problem is that, as far as I can see, it is. > > Depending upon what set of settings I use other mail > works from fitfully to pretty good. (And believe me, > I've tried a lot of settings.) > > =Paul= > > __________________________________ > Do you Yahoo!? > Protect your identity with Yahoo! Mail AddressGuard > http://antispam.yahoo.com/whatsnewfree ------- End of Original Message ------- -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
