What port does SMTP relay use?

Port 25
Port 25: SMTP port 25 continues to be used primarily for SMTP relaying. SMTP relaying is the transmission of email from email server to email server. In most cases, modern SMTP email clients (Microsoft Outlook, Mail, Thunderbird, etc.)

What is SMTP relayer in hMailServer?

Our outbound SMTP relay service allows you to use our email server to relay outbound emails. You will be provided a set of credentials that allows you to connect to our relay server to send emails for your domain name. hMailServer is a free open source email server for Microsoft Windows.

What is SMTP Mailtrap io?

Mailtrap.io represents a cloud-based email testing service with a fake SMTP server under the hood. You send test emails from your app and Mailtrap catches and puts them into a virtual inbox. You can be sure that none of the emails will get to a real user.

How do I set up a relay server?

To set up a smart host:

  1. In Server Admin, select Mail and click Settings.
  2. Under Relay all mail through this host, enter smtp-relay.gmail.com.
  3. Click Save to close the Server Admin.
  4. Restart the mail service.
  5. When you’ve completed your configuration, send a test message to confirm that your outbound mail is flowing.

How do I use Hmail?

Specifying public host name

  1. Start hMailAdmin.
  2. In the tree to the left, go to Settings -> Protocols -> SMTP.
  3. To the right, the SMTP settings are now shown. Click on the Delivery of e-mail tab.
  4. Under host name, enter the public hostname of the computer where hMailServer is running.
  5. Save the change.

How do I use Gmail SMTP relay?

Set up SMTP relay service

  1. Sign in to your Google Admin console.
  2. From the Admin console Home page, go to Apps Google Workspace Gmail.
  3. Next to SMTP relay service, click Configure.
  4. Set up the SMTP relay service by following the steps in SMTP relay: Route outgoing non-Gmail messages through Google.