validate authorized mail server
Protect Email senders and recipients from spam and spoofing by using an spf authentication approach and improving the deliverability of Email.
Prevent spamming and spoofing and improve the deliverability of email servers.
Use anti-spam techniques to confirm that the email received is truly from your email server, SPF is an authentication protocol used to fight against spam.
Use a public key, to decrypt your secret signature at the receiver server. If it succeeds, it will also authenticate your message, increasing the deliverability of all your emails as a result.
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