Unroutable mail domain

This can occur for several reasons.

Make sure you have the proper spelling of the email address and no extra spaces.

The recipient mail server may be having problems.

If you have sent more than 150 emails in an hour this will occur. Accounts are limited to 150 emails an hour to limit spam abuse. You will want to throttle the application to 150 an hour or perform 150 at a time.
  • 456 Users Found This Useful

Was this answer helpful?

Related Articles

What is a email mailing list?

A mailing list is a collection of email addresses which are assigned to a single name for faster...

When I log into webmail I receive a 404 error

We have updated webmail. Please be sure to update your bookmark to reflect...

Unable to log into Webmail

The format may need to be account name+domain.com instead of name@domain.com If this does not...

Outlook: Error Message: The Message Cannot Be Sent...

When you attempt to send an e-mail message in Outlook Express, you may receive the following...

Updating Outlook SSL Certificate

You may want to install SSL for your email or update an existing certificate you had installed...