Email spoofing

hi there.
i mind to spam some emails. which one is better, buy a SMTP server and send campaign with that or build my own with postfix?
by the way i wanna pass dmarc

When you say spoofing, Postfix with mailerQ is best, and you don't need to worry about dmarc, try to work on DKIM to match your resources.

Can't explain deeper cause we don't know for what purposes you're using this.

Good luck

To pass DMARC (Domain-based Message Authentication, Reporting, and Conformance), set up SPF (Sender Policy Framework) by creating a TXT record and defining authorized senders, then configure DKIM (DomainKeys Identified Mail) by generating a key pair, publishing the public key, and signing outgoing emails. Next, create a DMARC record with a policy (none, quarantine, or reject) and specify reporting options. Monitor DMARC reports to identify authentication issues and adjust your configuration as needed.