Transfer Notifications and Email Notifications are both features of Aspera transfer servers that send automatic emails when certain transfer events occur.
Both features allow you to configure emails to be sent to email addresses of your choice according to the transfer event of your choice. For example, both features allow you to send out automatic emails when a transfer to a particular host has completed. You can also configure what the emails will contain, and both features provide variables that you can use to include transfer information such as file names, source paths, transfer rate, and so on.
So what's the difference between these two features?
Email Notifications are a pre-post processing application, which is a capability of transfer servers to execute custom scripts during the course of a transfer session (for more on pre-post processing, see this article). Email Notifications require an SMTP server that you can reach on your network and that does not use any external authentication or SSL/TLS.
You configure Email Notifications by manually editing the aspera.conf file and adding the necessary XML tags. There are a number of transfer events, or filters you can trigger Email Notifications for, such as the start of a transfer session, the completion of a file transfer to a particular directory or when a transfer over a certain size completes, among others.
Transfer Notifications must be configured in the GUI application for your server, and can be set for only three transfer events: start, completion or error. Transfer Notifications likewise require an SMTP server you can reach on your network, but unlike Email Notifications support authentication and SSL/TLS.
Because everything is done in the GUI, you can create and save Mail Templates in either HTML or plaintext for your emails directly in the application. Transfer Notifications must also be set for either individual connections (in other words, transfer events that occur when transferring with a particular host), or for individual transfers, unlike Email Notifications which apply to any transfer that matches your desired filters.
You may use either or both of these email notification features depending on your needs. When you have the need for automatic emails on a variety or more complex set of events besides transfer starts, ends or errors, Email Notifications would be the feature to use. If on the other hand you only require emails for these standard transfer events, Transfer Notifications may be the better option as they don’t require editing a configuration file and are much more easily configured.
For more information on setting up and using either Email Notifications or Transfer Notifications, please consult your transfer server manual.