Date: Thu, 01 Jul 1999 17:29:47 +0100 From: Jason Thomson <jason.thomson@mintel.co.uk> To: sthaug@nethelp.no Cc: freebsd-isp@freebsd.org Subject: Re: Sendmail 8.9.x check_mail anti-spam rule broken? Message-ID: <377B977B.644C021D@mci.com> References: <377B53F8.34DE5461@mintel.co.uk> <30282.930836272@verdi.nethelp.no>
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I know. I wasn't suggesting that they were particularly competent. But they are one of many organisations that don't have A records for their domain name. The question I was really asking was: Is it necessary to have A records for a domain name in order to have EMail messages accepted by Sendmail 8.9.x for senders from that domain? As far as I was aware, it shouldn't be necessary to have an A record for a domain name, in order to send mail to that domain. If it's just btinternet with badly administered name servers, then fine, I can mail their postmaster and ask them to fix the problem. If it _is_ a problem with sendmail, then I'll tweak my config file, and add A records for all domains I maintain. sthaug@nethelp.no wrote: > > For example, some.one@btinternet.com gets rejected. But btinternet.com > > has perfectly valid MX records. BT Internet is probably one of the UK's > > biggest ISPs. > > They may be one of the UK's biggest ISPs. That doesn't mean they have > a clue: > > - It appears that both of the btinternet.com name servers are on the > same LAN segment (certainly behind the same router): > > btinternet.com. NS dns1.btinternet.com. > btinternet.com. NS dns2.btinternet.com. > > dns1.btinternet.com. A 194.73.73.95 > dns2.btinternet.com. A 194.73.73.94 > > and both behind a router at 194.74.74.71. > > (For that matter, both of their MX hosts also sit behind this same router.) > > - Neither of the btinternet.com name servers are authoritative for > btinternet.com. > > This doesn't exactly give me great faith in BT Internet... > > Steinar Haug, Nethelp consulting, sthaug@nethelp.no To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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