Date: Tue, 7 Mar 2017 13:24:56 -0500 From: John Johnstone <nospamfreebsd.jjohnstone@tridentusa.com> To: freebsd-questions@freebsd.org Subject: Re: Off topic: smtp HELO question Message-ID: <537cf87f-f60d-5e71-c6a2-1cb94cfcc649@tridentusa.com> In-Reply-To: <58BDBE2F.90207@sneakertech.com> References: <58BD94BD.9020405@sneakertech.com> <1350d47b-5723-5171-3cd9-27e9b02aeb8b@FreeBSD.org> <58BD9DC2.9020802@sneakertech.com> <20170306184357.60de652b@gumby.homeunix.com> <58BDBE2F.90207@sneakertech.com>
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On 3/6/17 2:53 PM, Quartz wrote: > I get a 7/10 (apparently because I never set a SPF to hook my mail > service to my domain?). If the fundamentals of your outgoing mail server aren't good enough, any hair-splitting differences with submission are irrelevant. I'd not spend any time worrying about your Thunderbird configuration unless you have evidence that it's a problem somewhere. You need to be especially careful that you have correctly implemented SPF or DKIM. Some mail servers will regard incorrect configurations worse than none. If your "external address floats around depending on what my ISP gives me" means that your mail server has an address in an ISP's DHCP address space, you're at a major disadvantage right there. Many mail servers will reject or score badly mail that comes from a dynamic IP. If you can't get a domain name of your choice (e.g. mail.your-domain-name.tld) assigned to your external IP, even if it is static, that's a major problem. You can lookup your IP at Spamhaus and if it's listed in the PBL you're almost guaranteed to have delivery problems. If you're operating your own mail server your volume may be too low to have an meaningful reputation but you can check your IP at someplace like SenderBase. You can do a web search on "email delivery". Sad to say but it's not a trivial topic in today's world. - John J.
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