3 outgoing mail server

Here are three outgoing mail servers:

  1. SMTP (Simple Mail Transfer Protocol) Server: This is the most common type of outgoing mail server. It's used to send emails from your email client (e.g., Gmail, Outlook) to the recipient's email server. The SMTP server is usually provided by your email provider or internet service provider (ISP).

Example: smtp.gmail.com (Gmail's SMTP server)

  1. SMTP Relay Server: This type of server is used to forward emails from your email client to the recipient's email server. It's often used by businesses or organizations that need to send large volumes of emails. The SMTP relay server acts as a middleman, relaying the emails to the recipient's email server.

Example: smtp-relay.gmail.com (Gmail's SMTP relay server)

  1. Submission Server: This type of server is used to send emails from your email client to the recipient's email server. It's similar to an SMTP server, but it's specifically designed for sending emails from a mail client to a mail server. The submission server is often used by email providers to send emails from their users.

Example: submit.gmail.com (Gmail's submission server)

Note that these are just a few examples, and there may be other types of outgoing mail servers depending on your email provider or setup.