Basic mail gateway services

Here are some basic mail gateway services:

  1. SMTP Relay: An SMTP relay service allows you to forward incoming email messages from your domain to a mail server or a cloud-based email service.
  2. Mail Forwarding: Mail forwarding services forward incoming email messages from your domain to another email address or a mail server.
  3. Spam Filtering: Spam filtering services scan incoming email messages for spam and viruses, and block or quarantine suspicious messages.
  4. Virus Scanning: Virus scanning services scan incoming email messages for viruses and malware, and block or quarantine infected messages.
  5. Content Filtering: Content filtering services scan incoming email messages for specific keywords, phrases, or attachments, and block or quarantine messages that match certain criteria.
  6. Email Encryption: Email encryption services encrypt outgoing email messages to ensure that they are secure and cannot be intercepted or read by unauthorized parties.
  7. Domain Key (DKIM) Verification: DKIM verification services verify the authenticity of incoming email messages by checking the digital signature of the sender's domain.
  8. Sender Policy Framework (SPF) Verification: SPF verification services verify the authenticity of incoming email messages by checking the IP address of the sender's mail server against a list of authorized IP addresses.
  9. Domain-based Message Authentication, Reporting, and Conformance (DMARC) Verification: DMARC verification services verify the authenticity of incoming email messages by checking the digital signature of the sender's domain and reporting any suspicious messages.
  10. Email Archiving: Email archiving services store incoming and outgoing email messages in a secure database for a specified period of time, allowing you to retrieve and search email messages later.

Some popular mail gateway services include:

  1. SendGrid
  2. Mailgun
  3. Amazon SES
  4. Microsoft Azure Mail Relay
  5. Google Cloud Postmaster
  6. OpenDKIM
  7. SpamAssassin
  8. ClamAV
  9. Postfix
  10. Exim

These services can be used to improve email deliverability, reduce spam and malware, and enhance email security and compliance.