Date: 6 Mar 2017 22:20:03 -0000 From: "John Levine" <johnl@iecc.com> To: freebsd-questions@freebsd.org Subject: Re: Off topic: smtp HELO question Message-ID: <20170306222003.26539.qmail@ary.lan> In-Reply-To: <58BD9DC2.9020802@sneakertech.com>
next in thread | previous in thread | raw e-mail | index | archive | help
This really should go to the mailop mailing list. See https://chilli.nosignal.org/mailman/listinfo/mailop and don't be surprised if its TLS certificate is expired. When you send mail, Thunderbird is doing submission, not SMTP. They are similar, but they are not the same. Approximately 100% of submission clients behind NATs put some random name or IP as the EHLO name, and it doesn't matter. That's not your problem. >I do use TLS, but what I'm trying to debug is not so much that the email >service *I* use checks, but that the final receiving server scans >through the headers and flags anything with a NAT address. That would be, to put it mildly, stupendously broken. If they do that, their false positive rate will be something like 50%, including everything sent from Gmail. It would be a good idea to check again and see if perhaps they're doing something else and your problem is something else. Regards, John Levine, johnl@iecc.com, Primary Perpetrator of "The Internet for Dummies", Please consider the environment before reading this e-mail. http://jl.ly
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20170306222003.26539.qmail>