Why do I get the error "530 SMTP authentication is required" when I try to send an e-mail?

This article applies to Dedicated Servers.

This article explains how to correct the error message 530 SMTP authentication is required when attempting to send an e-mail through an e-mail client like Outlook Express or Mozilla Thunderbird.

In order to send e-mail securely through our mail servers, the SMTP authentication option needs to be enabled within your e-mail client software.

The exact method for doing this differs depending on the software used. Instructions for configuring SMTP authentication in Outlook Express are below:


Click the Tools menu at the top of the window and then click Accounts.


Click the Mail tab on the resulting Internet Accounts Window, and select your Donhost e-mail account


Click Properties to open the Properties dialogue box for your e-mail account


Under the Outgoing Mail Server heading, check the My Server requires authentication box and click OK