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We're having some email deliverability problems and I've tracked it down to a couple of issues:

  1. SPF/DKIM records are mismatched
  2. Our app is sending mail from one domain on behalf of another without permission

Our app is set up to send mail through a mail server at companymailserver.com, but we're changing the FROM address to come from support@companyname.com.

I can't quite figure out what needs to be done to authorize companymailserver.com to send mail on behalf of support@companyname.com

I know I need to handle this with Domain Delegation, but I'm at a loss on how to actually set that up.

If someone can point me in the right direction I'd be very grateful!

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To authorize companymailserver.com to send mail for companyname.com you would need to add an SPF record to the companyname.com public DNS to specify that it is allowed.

companyname.com IN TXT v=spf1 ip4:1.2.3.4 ip4:2.3.4.5 -all

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