When generating these units, any mix of upper and lower case
alphabetic characters may be used. The case shown in this
specification is suggested for message-creating processes.
Note: The reserved local-part address unit, "Postmaster", is
an exception. When the value "Postmaster" is being
interpreted, it must be accepted in any mixture of
case, including "POSTMASTER", and "postmaster".
TELUS is currently the only mailbox provider where we see subject lines, or any other data, stripped because of all caps entries. All other mailbox providers that Blackbaud sends to, including Gmail and Microsoft properties, render subject line and other data appropriately with the same data format utilized. As such, we believe that this issue lies with TELUS and that a change to the subject line format by Blackbaud is not required. We are working with TELUS to evaluate this issue and will update this article when we have more information.