Authentication is a way to prove an email isn't forged. SPF and DKIM are most common used authentication methods.

SPF (Sender Policy Framework) is a way for email service providers to verify that a mail server is authorized to send email for a domain.

DKIM is an authentication protocol that is used by email receivers to determine if an email message was sent by who it says it was sent by. DKIM often improves deliverability of emails to the inbox since a receiver can be confident that the message is not a forgery.

You will need access to your DNS server to make these updates or you will need access to a hosting panel that has access to edit your DNS records.

Step 1: DKIM (Create a TXT record )

Record Type: TXT
HOST: em2._domainkey
TXT Value: v=DKIM1; g=*; k=rsa; h=sha256; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDFglQm7n/fDQtvHod5nHTc4MDhUSJaTwigoCjUbBFxpUFd+VgG27WdbQe2UyJ9sDk7TWbzjfB3G22YcB5q3EHFRaIiEx8YjZI/yF1CxkaYpz4EHdNq6MdJ09WNWhTH/ArAHLFx02d+81wfISv9o0QWt7IziA6FGZgzUOstTzMnYQIDAQAB

Step 2: SPF

If you don't have SPF records for your domain, then Create a TXT record
Record Type: TXT
TXT VALUE: v=spf1 ~all

Note: If you already have SPF record just add "" to existing SPF record.

Example: Lets say you have the following SPF record: v=spf1 +a +mx +ip4: ~all

After adding "" to existing SPF record you should have

v=spf1 +a +mx +ip4: ~all

Step 3: Outgoing Mail Server Settings

SMTP Server Address:

Secure Connection: TLS/SSL based on your mail client/website SMTP plugin

SMTP Username: provided to you at signup

SMTP Password: provided to you at signup

SMTP port: 465 (SSL) or 587 (TLS)

NOTE: After you update your SPF you should wait 24 hours before sending due to DNS propagation.

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