You need to have separate SPF records for each subdomain you wish to send mail from. The following was originally posted on openspf.org, which used to be a great resource for this kind of thing. Latest link http://www.open-spf.org/FAQ/The_demon_question/ The Demon Question: What about subdomains? If I get mail from pielovers.demon.co.uk, and there’s no SPF data … Read more
The way described is the way you create multiple records on Route 53. Entering two values in the textarea separated by a newline will result in two distinct records in the DNS. This is why Amazon call it a “record set” – it is a set of records.
To defeat your enemy, you must know your enemy. What is spam? For our purposes, spam is any unsolicited bulk electronic message. Spam these days is intended to lure unsuspecting users into visiting a (usually shady) web site where they will be asked to buy products, or have malware delivered to their computers, or both. … Read more
v=spf1 include:_spf.google.com include:otherdomain.com ~all There’s no restriction against including multiple names in a single entry; Hotmail, for instance, takes this to extremes. Note that multiple includes, or nested ones, need to stay under the limit of 10 total DNS lookups for the whole SPF check.