Publishing a Sender Policy Framework (SPF) Record in your domain’s DNS specifies which server IP addresses are allowed to send emails from your domain.
Having a properly set up SPF record makes it less likely that outgoing mail will be tagged as spam.
Return as a TXT Record
Although it appears that best practice is to publish SPF records via DNS as both a SPF and TXT record, the DNS management utilities for some hosts only provide for the addition of txt records
For a good description of SPF as TXT records, see here.
From the MS Generator:
v=spf1 a mx ip4:123.45.678.90 mx:mail.yourdomain.com -all
Add text record with
-all amended to
~all, which allows a ‘soft fail’:
v=spf1 a mx ip4:123.45.678.90 mx:mail.yourdomain.com ~all
This assumes that there is also an mx record for a mailserver for the domain in question.
Check SPF Record
Use this tool to check SPF records on your domain.
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