Allow the developer to add other header information to a mail. Specifically, in this case Disposition-notification-to, but probably also others. A value pair of ADDITIONAL=XXXXXXX which is then just dumped into the headers would allow for extra lines to be added as a whole string.

Use Case

We have been adding %%^D-N-T: to the subject value pair. Since this has gone Unicode, it no longer triggers the read-receipt feature (and, in fact, adds the DNT line to the subject). There is no way for us to add this to the headers of a mail sent from UPOPMAIL.


The current coding prevents developers form using all the functionality of the mail systems.



Operating System

Not Applicable



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