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SME Server:Documentation:Administration Manual:Appendix (view source)
Revision as of 08:07, 5 November 2008
, 08:07, 5 November 2008Added SPF Records section
For example, if the ''nslookup d.c.b.a.in-addr.arpa'' (the reverse lookup for your IP) returns ''dsl-a-b-c-d.mycity.myispsname.com'' then before trying to send email directly from your SME to the Internet at large you want to make sure that ''nslookup dsl-a-b-c-d.mycity.myispsname.com'' returns your ''a.b.c.d'' and not an error or some other address.
For example, if the ''nslookup d.c.b.a.in-addr.arpa'' (the reverse lookup for your IP) returns ''dsl-a-b-c-d.mycity.myispsname.com'' then before trying to send email directly from your SME to the Internet at large you want to make sure that ''nslookup dsl-a-b-c-d.mycity.myispsname.com'' returns your ''a.b.c.d'' and not an error or some other address.
=====SPF Records=====
SPF (Sender Policy Framework) records are added to the DNS zone record for domain names. Many receiving mail servers now require sending mail servers to have properly configured SPF records for the domain(s) being sent from. Failure to have SPF records can result in mail being rejected by mail servers eg Hotmail servers will reject mail that comes from mail servers without SPF records.
The SPF entries are added to your external DNS records. They are not configured on the sme server.
See http://www.openspf.org/
References:
http://forums.contribs.org/index.php/topic,21631.0.html
http://forums.contribs.org/index.php/topic,31726.0.html
http://forums.contribs.org/index.php/topic,34664.0.html
http://forums.contribs.org/index.php/topic,40009.0.html
http://forums.contribs.org/index.php/topic,42373.0.html
=====Dynamic DNS Services=====
=====Dynamic DNS Services=====