Why can't I send emails?

This article applies to 123-reg Email and 3rd Party Email Clients.

If you are having trouble sending emails with your 123-reg email, this information can help you resolve your issue as we have listed some of the most common causes below:

  • Login to 123-reg web mail then attempt to send the same email, if you can send emails from our 123-reg web mail service this usually indicates a local issue with your network / computer or email client. Click here to find out how to login to 123-reg web mail.

Email Client Issues

  • Check that you have entered the correct outgoing mail server: smtp.123-reg.co.uk
  • Ensure that the options for My server requires authentication and Use same settings as my incoming mail server are enabled.
  • Use default outgoing smtp ports 25 or alternatively if port 25 is blocked please use port 587 or vice versa.
  • Ensure that the option for SSL is switched off, if switched on please use port 465
  • Try switching the outgoing mail server to your Internet Service Provider's SMTP server address as some ISP's policies may restrict the use of a 3rd party SMTP server.
  • If you have a firewall or anti virus software enabled on your computer please ensure that you add a allow or exception rule for smtp.123-reg.co.uk and/or IP address

Tip: Please remember that you will need to close and restart your email client after you have made any change so that it can take affect.

  • If you wish to use the 123-reg SMTP service with a old pophost mailbox account, you will need to upgrade your email account free of charge. Click here to find out how to upgrade.

Please Note: If the comprehensive list of above solutions does not resolve your query it maybe useful to contact your email client / software provider by visiting the appropriate support site e.g:

Additionally you can also contact your Internet Service Provider who should be able to run further tests to identify / resolve email issues.


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