Date: Mon, 23 Aug 1999 22:28:38 -0500 From: David Vondrasek <david@davidv.net> To: "Alastair D'Silva" <deece@newmillennium.net.au>, "Freebsd-Questions" <freebsd-questions@FreeBSD.ORG> Cc: cpeters2@home.com, charles@chickenbean.com Subject: Re: sendmail relaying rules causing problems Message-ID: <199908240329.WAA00378@ns1.davidv.net> In-Reply-To: <03da01beee49$12ddc660$6b6d08cb@omen.com.au> References: <002101beeced$26e811e0$cb730418@charles.domain>
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At 08:55 AM 8/24/99 -0700, Alastair D'Silva wrote: >----- Original Message ----- >From: Charles A. Peters <cpeters2@home.com> >To: Freebsd-Questions <freebsd-questions@FreeBSD.ORG> >Sent: Sunday, 22 August 1999 15:24 >Subject: sendmail relaying rules causing problems > > >> I have a small email server that hosts about 200 email accounts. The >> account holders typically check their email from locations such as >> bellsouth.net, innova.net, carol.net, mindspring.net, etc..., but >> when they check from these domains, they get a relaying denied error >> 550 message back from my server. I found that I can fix this by >> placing their ip address in my /etc/mail/relay-domains file, but if >> they dial in later, I have to change the address in the >> /etc/mail/relay-domains file and killall -hup sendmail. This is not >> practical. >> >> I have considered turning off the relaying rules in sendmail to fix >> the problem, but I don't want to leave my server open for abuse. >> >> Does anyone have any suggestions as to how to fix this? >> >> Thanks in advance! >> >> Charles >> >> mailto: cpeters2@home.com >> mailto: charles@chickenbean.com >> > > >Simple solution, get them to use the mail server local to their ISP for >sending mail, and only have them check mail off your server via pop3/imap4. > Another approach is to limit mail server access to only those users who have authenticated themselves with a POP password. This is the so-called POP-before-SMTP solution. Although this is more complicated to setup, it is an excellent solution for providers that have "roaming users." http://spam.abuse.net/tools/smPbS.html David Vondrasek http://www.davidv.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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