PROBLEM:

When sending a mail from the shop by using the feedback page or on checkout, the following error message is displayed:

Error sending message:
The message could not be sent to the SMTP server. The transport error code was 0x80040217. The server response was not available.

This error would appear using Q-Shop v3.x and CDOSYS.

RESOLUTION:

This is generally caused by using incorrect authentication details. If your SMTP server needs a login/password make sure this is correctly specified in the control panel of Q-Shop. If your SMTP server does not need a login and password, please make sure these are left empty.