How to include multiple domains in an spf TXT Record

Question

I am looking to setup a TXT spf record that has 2 included domains... individually:

v=spf1 include:_spf.google.com ~all

and

v=spf1 include:otherdomain.com ~all

What is the proper way of combining them into a single item?

Answer 1

v=spf1 include:_spf.google.com include:otherdomain.com ~all

There's no limit on including multiple names in a single entry; Hotmail, for instance, takes this to extremes.

Answer 2

v=spf1 include:_spf.google.com include:otherdomain.com ~all

Answer 3

It look like you can merge both together into one entry. Lenovo.com appears to be an example of this.