Skip to main content
New Outlook for Windows lets you set a custom outgoing SMTP server during account setup in Advanced settings.New Outlook for Windows lets you set a custom outgoing SMTP server during account setup in Advanced settings.

​
SMTP settings

Shared IP plans are only available to customers in Denmark.

​
Add an account with mySMTP

1

Open account settings

In New Outlook, click Settings > Accounts > Email accounts.
2

Start adding an account

Click Manage, then click Add account.
3

Enter your email address

Type your email address, then click Continue or Advanced setup.
4

Choose the account type

Select IMAP or POP.
5

Enter the incoming server details

Fill in your incoming mail server settings as provided by your email provider.
6

Enter the outgoing SMTP details

In the outgoing server section, enter:
  • SMTP server: your relay hostname (e.g. relayxx.mysmtp.com)
  • Port: 587
  • Encryption method: STARTTLS
  • Authentication: on
  • User Name: your mySMTP SMTP username
  • Password: your mySMTP SMTP password
7

Complete setup

Click Next or Done to finish. Send a test email to verify delivery.
New Outlook does not let you edit the SMTP server on an existing account. To change the outgoing server later, remove the account and add it again with the steps above.

​
Troubleshooting

  • Cannot add the account: confirm you selected Advanced setup and chose IMAP or POP. Microsoft 365 and Exchange accounts do not allow custom SMTP.
  • Connection fails: check that the port is 587 and encryption is STARTTLS. If your network blocks 587, try 2525.
  • Authentication error: re-enter your mySMTP username and password.
For more error codes, see Common SMTP errors.