General Instructions for configuring AuthSMTP

Important Points

  • First you need to make sure the email address(es) you will be sending from have been authorised for your account in our Control Panel.
  • These instructions assume your email software has already been setup and is collecting email correctly.
  • Take a note of any settings you change.
  • Only change the items specified - you should not need to change your incoming email settings.
  • These are general instructions for configuring AuthSMTP with your software - a list of setup guides for specific email programs can be found here - How To Setup AuthSMTP or contact us.


  • Locate the 'Settings' section of your software / application where you can enter an SMTP server
  • Enter the SMTP server we have provided you with into the 'SMTP Server' or 'Outgoing Email Server' field
    • Typically ''
  • Locate the SMTP 'Username' and 'Password' fields and enter the details we have provided you with
    • Username would typically be 'ac' followed by 5 digits (e.g. aa12345)
  • If there is any options relating to password security such as the following we recommend that you set them to OFF / NONE / DISABLED or if that is not possible set it to PLAIN:
    • Secure Password Authentication
    • CRAM-MD5
    • DIGEST-MD5
    • NTLM
    • PLAIN (Recommended)
    • LOGIN
  • If there is an option to change the SMTP / Outgoing Port number we recommend you set this to '2525' but you also have the options of 23, 25, 26
  • If there is any options relating to SSL we recommend that there are disabled, if you do wish to use SSL you will need to login to the Control Panel and enable that feature on your account
  • Once you have configured those options you should be able to send emails via AuthSMTP
  • You will need to make sure the email address you are sending from is registered and validated on your account, if you are having problems you can view any errors being logged against your account via the Control Panel