I have a vendor whose emails are going into a quarantine folder in the O365 admin center.
I ran a message header analyzer and found this.
Authentication-Results: spf=pass (sender IP is 13.111.207.78) smtp.mailfrom=bounce.relay.corestream.com; mcneese.edu; dkim=none (message not signed) header.d=none;mcneese.edu; dmarc=none action=none header.from=mcneese.edu;compauth=fail reason=601
Adding a DMARC/DKIM is completely new for me and i am not sure how to do this.
I found the SPF and was wondering if I need to add the vendors IP into the spf ip:4 field?
Usually, we have a TXT record _dmarc.yourdomain.com and a value as an example from below: v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1
Furthermore, DKIM is also an TXT record type as SPF too.
DKIM value is being generated at your server for your domain, later on added to DNS for your domain, while the private key is saved on the server itself.
You can use below tool to check for existing DKIM if so:
Nevertheless, sharing here a list of websites/tools I usually use to check my e-mail functionallity, test or even generate something in case I forgot how does it go:
