The Sender Policy Framework was the first authentication protocol. Develop to prevent email address forgery. It allows you to identify which mail servers are authorize to send emails for a given domain. By adding a list of authorize IP addresses and domains as an SPF record to your domain’s DNS records.
SPF allows ISPs to identify emails from spoofers. Scammers, and phishers when they attempt to send malicious emails from a domain they don’t own.
When an email is receive the switzerland phone number library receiving. Server verifies the SPF record. By looking in DNS to see if the sending server’s IP address is list. If the IP address isn’t authorize. The email may be rejected or sent to the spam folder.
SPF is the oldest protocol and, on its own. Does not sufficiently guarantee email deliverability. That’s why we’ll now talk about the newer protocols – DKIM and DMARC.
DKIM (Domain Keys Identified Mail)
DKIM comes later and adds an extra layer of security by affixing a unique digital signature to your emails. The domain owner generates a public/private key pair—the public key is published in DNS records, and the private key is used to sign outgoing emails. When an email is sent, a DKIM signature is added to the message header.
When you send an email, it includes don’t try to send from domains like this signature, which receiving servers verify using your public key to ensure the message actually came from your domain and hasn’t been tampered with. This digital signature is a trust signal to email service providers, greatly increasing the likelihood that your emails will be successfully delivered.
DMARC (Domain-based Message Authentication, Reporting, and Conformance)
DMARC combines the powers of SPF and DKIM, adding a taiwan lead set of instructions for email service providers on what to do if they encounter an email that doesn’t pass these checks. It’s a bit like a security guard knowing exactly what to do with uninvited guests, whether that means turning them away or keeping an eye on them.