SPF Record Necessary for 3rd Party SMTP w/ Postfix?
I used one of the guides to set up Postfix to send mail using SMTP from SendinBlue. After some trial and error, it is working well. I set up mail to be able to use the contact features in the web based app webtrees that I set up on my server.
My question is, do I need to set up any sort of SPF record or add additional records to Linode's DNS manager? When I created my linode (a LAMP running Ubuntu 20.04) and added my domain, I had it create some standard records in the DNS manager and later added reverse DNS records.
Hi @felipesnark - I'd definitely recommend setting up an SPF record if you plan to send mail directly from your Linode. It's a requirement of many mail providers to accept mail from a given domain, so if you don't have an SPF record it's likely mail from your Linode will be automatically be blocked by some mail services.
Thanks for the reply, @mjones. So even if I set up a relay to send mail through SendInBlue, I still need the SPF record? Just making sure I understand correctly.
I would say yes…an SPF record may be a requirement of SendInBlue…especially if you're using it as a relay. Having an SPF record won't hurt you if you don't need it but not having one will cause you great pain if you do need it.