I will fix spf dkim dmarc email deliverability issues in 1 hour

An SPF record is a TXT record that is part of a domain's DNS zone file. The TXT record specifies a list of authorized host names/IP addresses that mail can originate from for a given domain name

DKIM (Domain Keys Identified Mail) is an email authentication technique that allows the receiver to check that an email was indeed sent and authorized by the owner of that domain. This is done by giving the email a digital signature

DMARC is an email-validation system. DMARC was created by PayPal together with Google, Microsoft and Yahoo!. With DMARC an organization gains insight and control over their email channel. Organizations can use DMARC to protect their brands against abuse in phishing and spoofing attacks.

Put simply, SPF, DKIM and DMARC are ways to authenticate your mail server and to prove to ISPs, mail services and other receiving mail servers that senders are truly authorized to send email. ... These antispam measures are becoming increasingly important, and will one day be required by all mail se

If your domain does not have an those record, some recipient domains may reject messages from your users because they cannot validate that the messages come from an authorized mail server. The SPF DKIM DMARC are a TXT type record that specifies what servers may send an email on behalf of your domain

Many factors can affect deliverability, including having a good sending reputation, properly authenticating your mail through SPF and DKIM, and having strong permission practices.The health of the messaging infrastructure, What’s in the message Who’s sending it, and receiving system’s availability