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How to read a SPF record and allow Google Apps Gmail to send for your custom domain

An SPF record is a hack. It's a way of using the DNS protocol to say who is allowed to authoritatively send email as a domain name. It does this by using a DNS TXT record (as opposed to an A or MX record). TXT can contain any text. An SPF record is a specially encoded TXT record like this:

"v=spf1 ip4:198.51.100.26 -all"

The v=spf1 indicates that this is an SPF record, considered version 1 of the spf standard.

After the version, there are any number of 'directives'. In this example, there's only 1...

spf | TECH.SAIGONIST.COM

Error

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Error message

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  • Error: Class 'CToolsCssCache' not found in _cache_get_object() (line 32 of /home/tomo/web/tech.saigonist.com/drupal7/php/includes/cache.inc).
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