Best way to prevent server IP blacklist for outgoing spamming control,
Email Security Best Practices-DMARC with SPF DKIM
Outgoing email to an email server around, DMARC, rDNS, SPF, DKIM, always external security to protect mail system,
SPF and SenderID
Sender Policy Framework (SPF) is an e-mail verification method, using a spoofing system is designed to prevent unwanted email. SPF to verify the source IP of the email content is being compared with a DNS TXT record. Genrate SPF Record.
Example: IN TXT "v=spf1 mx -all"
Identify the domains Mail (DKIM), domain name email and email associate a person or company to assume responsibility is a method to allow.
Example: 4BA05AC4-2C77-11E6-zcghxhghxxxxx._domainkey IN TXT ( "v=DKIM1; k=rsa; " "p=MIGfMA0GCSqGSIIen8X6HghbjAI6Ghxgw/S4FNOlTGilxb7tySoShPjkEe/j9EygqfLxiL5U65FiYxR9sUMiVX+8C68+tVqVp6jhR7UUS3/jtQIDAQAB" )
DMARC is the best way to protect your email traffic against phishing and other fraudulent activity: Create DMARC Record
Example:.IN TXT "v=DMARC1; p=none; sp=none; ruf=mailto:email@example.com; rua=mailto:firstname.lastname@example.org;fo=1; rf=afrf; pct=100; ri=86400"
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