Setting correct SPF records for your domain's mail server can
help in reducing spammers using your domain for nefarious
purposes! Spam. No one likes it. No one wants it. No one needs
it. However, it is there and is likely to be there for the
foreseeable future. All we can do as responsible mail server
administrators is to ensure we are not part of the problem by
not running an open relay and locking down our services as much
as possible. One tool that can help our legitimate email not
being classed as spam is to set a Sender Policy Framework (SPF)
record in our domain's DNS zone. A SPF record is a DNS TXT
record and is added to our DNS zone in the same manner that A
records and MX records are added. I started the article with a
commentary regarding spam email. A common method spammers use is
to forge the sender address in the email. Thus, they send email
from their mail servers but with your domain as the sending
email. The SPF record (remember the record is associated with
the domain) specifies which mail se