Gabriel Granger wrote:
I'm really new to SPF and it sounds great but I have some questions
regarding it adoption in large international companies. Basically I
work for a company and we have a product that allows clients to send
emails to their customers (All opt-in) and not SPAM.
That would be "spam", not "SPAM" ;-)
See: http://www.spam.com/ci/ci_in.htm
> My question is
with regard to my companies clients where they are large international
organisations where there might be 2 MX records for receiving mail, but
maybe 10 - 20 out bound servers spread across the globe
Having 10-20 outbound servers shouldn't be a big problem. In fact, if all of
them have reverse DNS set up to point to hostnames in the large company's
domain, a single "ptr" entry in the SPF record could cover them all.
> plus dialup
users which will use which ever mail server they can send through based
on the ISP their using in the country their in at that time.
This would be more problematic. However, a way around it would be for these
users to use SMTP AUTH with one of the company mail servers, so that the
outbound mail would come from one of the officially sanctioned mail servers.
Or a VPN-based system could provide a similar solution. I would be surprised
if most of these large international companies didn't already support at least
some of this.
Paul.