SPF Configuration question

[hgutierr]

Hi.

I'm hosted on cpanel77, I have just enabled SPF, so this record is automatically generated:

v=spf1 +a +mx +ip4:216.172.104.4 ~all

However I did some testing and this is the email header:

Received: from mx1.gzo.com (mx1.gzo.com. [216.172.104.8])
...
Received-SPF: softfail (*******.com: domain of transitioning ******@*********.com does not designate 216.172.104.8 as permitted sender) client-ip=216.172.104.8;

I added 216.172.104.8 and now I get a "Received-SPF: pass"

My question is: Is it possible this address (216.172.104.8) changes in the future?

Should I use the following SPF record or something different?

 v=spf1 +a +mx +ip4:216.172.104.4 +ip4:216.172.104.8 ~all

Thanks.

[AndrewT]

You will want to include 216.172.104.8 but it wouldn't hurt to also include 199.193.113.29. These are both of our outbound mail relays.

[AndrewT]

For future reference and anyone that stumbles on this thread going forward I did just publish a blog post on this very subject, including the required SPF record changes.

https://blog.dathorn.com/2015/06/spamtitan-spf-records/