Desired: autoreply to commentors' email addresses (not requestors)

I suspect this is trivial to achieve, but haven’t found where to look.

In some cases I’m feeding rt-mailgate from a shell script. The shell
script creates an email “From:” header for a valid email address (for
terminology’s sake let’s call such an address an “emailer”), however
"emailers" will frequently not be the ticket requestor.

Ideally I’d like to have a confirmation email sent by RT to each
"emailer" directly after RT has successfully completed the scripted
rt-mailgate invocation that was made on that “emailer”'s behalf. The
"emailers" don’t necessarily play any further part in the process, so
I’d prefer them not to become, e.g., Cc’s on the ticket as a whole. I’m
not sure if a scrip / template can easily get at the “From:” of a
particular comment transaction made on a ticket.

I could get something to work by constructing an “emailer” reply if
there appear to be no errors from the rt-mailgate invocation. However it
would be best for RT templates to be used, since then our existing RT
user/group authorisation structure can be put to work appropriately for
this task (e.g. editing the message that gets sent).

David Eyers wrote:

I suspect this is trivial to achieve, but haven’t found where to look.

Indeed it was trivial to achieve.

In some cases I’m feeding rt-mailgate from a shell script. The shell
script creates an email “From:” header for a valid email address (for
terminology’s sake let’s call such an address an “emailer”), however
"emailers" will frequently not be the ticket requestor.

Ideally I’d like to have a confirmation email sent by RT to each
"emailer" directly after RT has successfully completed the scripted
rt-mailgate invocation that was made on that “emailer”'s behalf. The
"emailers" don’t necessarily play any further part in the process, so
I’d prefer them not to become, e.g., Cc’s on the ticket as a whole. I’m
not sure if a scrip / template can easily get at the “From:” of a
particular comment transaction made on a ticket.

In the Correspondence template for the queue on which I want the
aforementioned replies, I added the following line in the headers and
all seems to be well:

Bcc: {$Transaction->CreatorObj->EmailAddress}