Date: Mon, 06 Mar 2017 12:34:58 -0500 From: Quartz <quartz@sneakertech.com> To: freebsd-questions@freebsd.org Subject: Re: Off topic: smtp HELO question Message-ID: <58BD9DC2.9020802@sneakertech.com> In-Reply-To: <1350d47b-5723-5171-3cd9-27e9b02aeb8b@FreeBSD.org> References: <58BD94BD.9020405@sneakertech.com> <1350d47b-5723-5171-3cd9-27e9b02aeb8b@FreeBSD.org>
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> So if your NAT transforms internal addresses to W.X.Y.Z and a reverse > lookup 'host W.X.Y.Z' returns 'foo.example.com' then you should > configure your mail client to EHLO as 'foo.example.com' OK thanks, that's kinda what I was expecting. Unfortunately for me, my external address floats around depending on what my ISP gives me, so I can't configure a static name in my client to match that. For now I'm trying to see what happens if I set it to the name of my domain I own, but the servers that host that aren't the ones I send mail through. >For mail submission you generally > identify yourself by logging into the server after switching your > connection to TLS, 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. I'm having intermittent problems with some of my mail being flagged as spam when I mail anyone at a local university and I'm not sure what's going on yet.
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