Almost certainly not - most current email programs support SMTP authentication and are compatible with our AuthSMTP service.
We have a list of email programs which are compatible with AuthSMTP and we have guides to configuring SMTP with all the latest email programs and devices.
If you have any questions please contact us.
AuthSMTP is the outgoing SMTP email service for your e-commerce website, mailing list or email program.
It works on most current computers or devices and solves many of the common problems with sending email such as relaying denied errors or blacklisting issues.
With instant setup, a money back guarantee and very low cost starter accounts you can test and start sending email in minutes with no risk.