Setting Up SPF Records for Multiple Domains

Hello Everyone and thanks for your help in advance. I have a Windows Server
that hosts multiple domains along with another server that is running
Exchange. Several of the domains have MX records associated with them. I am
having delivery problems to some recipients and suspect I need to set up SPF
records for some of the domains that utilize email. I have looked at some
articles regarding setting up SPF records, but am confused as to what the
format of these DNS entries should be. Basically, the MX record points to
mail.maindomain.com. I need to set up SPF for domain1.com, domain2.com, etc.
Any help on this topic would be greatly appreciated.

kmcnet wrote:

> Hello Everyone and thanks for your help in advance. I have a Windows
> Server that hosts multiple domains along with another server that is
> running Exchange. Several of the domains have MX records associated with
> them.

> I am having delivery problems to some recipients and suspect I need to set
> up SPF records for some of the domains that utilize email.

what sort of problems?

> I have looked at some
> articles regarding setting up SPF records, but am confused as to what the
> format of these DNS entries should be.

http://www.openspf.org and look at the tools

If your running multiple domains suggest using a include: directive to
centrally manage all the records.

> Basically, the MX record points to
> mail.maindomain.com.
> I need to set up SPF for domain1.com, domain2.com,
> etc.
> Any help on this topic would be greatly appreciated.

Consider SPF as where the mail comes from and MX as where mail goes to and
you shouldn't get too confused. They are fairly different. If mail comes in
and out the same server using spf records of "v=spf1 mx -all" is
convenient. Otherwise don't even consider MX records as part of SPF design.

SPF lists like http://www.listbox.com/member/archive/735 can help too.

Dan