-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Mon, Dec 14, 2015 at 02:46:43AM +0000, Steve Kleene wrote:
[...] > I am running mailto/sendmail from the command line, configured locally by > /etc/sendmail/sendmail.cf. This file includes: > > DSsmtp.uc.edu > > This sets my employer's server smtp.uc.edu as SMART_HOST. I did not route > through that server until 2006. At that point an organization across the > street began refusing emails because my IP was seen as dynamic. I had to > route through smtp.uc.edu to get around that. I haven't tried lately to go > back to the pre-2006 system. I do have one machine with a fixed IP. On my > desk machine I masquerade to the fixed IP, but apparently e-mails from the > desk machine were detected as dynamic IP before the header was even checked. That sounds like a lot of guesswork. Note that the spam [1] protection strategies are extremely varied these days, ranging from "I only accept mail from a couple of well-known sites" to DKIM [1] or SPF [2] and a whole zoo of other measures which don't really work (half of the spam I get has a DKIM, which suggests that some filters are spoofed by it). Perhaps the DKIM record of your uni doesn't list your IP address as one allowed to send mail from this domain? Other criteria are the domain's reputation and RBLs. The first mail I sent to a friend on outlook.com (I maintain my own mail server) never arrived (no bounce, no nothing: it just disappeared). Once she sent me a mail, "the channel was open". Spam filtering is hard. Add to this that the "biggies" don't dislike the situation that people have to turn to them to be able to reliably send mail, and then you see why they take half-hearted measures which generate "some" collateral damages. It's disgusting: mail, as a true peer-to-peer communication medium is dying thanks to spam, and thanks to the likes of Microsoft, Yahoo, Facebook, Google, Twitter et al. As if they were allies. So if you want still to send mail from your own IP, you'll have to know a bit about spam. Another thing: don't be impatient with the Debian listmasters. They're doing volunteer work. They deserve our appreciation. And if things don't work as they should, perhaps offering our hand is better than venting our ire. Cheers [1] Yes, counter to your suggestion in another mail I do mention the word "spam", because you can't explain the current situation without that. [2] https://en.wikipedia.org/wiki/DomainKeys_Identified_Mail [3] https://en.wikipedia.org/wiki/Sender_Policy_Framework [4] https://en.wikipedia.org/wiki/DNSBL - -- tomás -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlZuivsACgkQBcgs9XrR2kZq7ACeJuNNyiKaPEg+R/EA974On2+k 8nYAn3+Q0eQOalTD5wV0bw0REqQ6pOFx =GRxP -----END PGP SIGNATURE-----