# - rt+NNNN@rt.debian.org : attach correspondence to ticket (verbose)
# - rt+NNNN-quiesce@rt.debian.org : attach correspondence to ticket (quiesce)
# - rt+NNNN-<action>@rt.debian.org : attach correspondence to ticket (some action)
# - rt+NNNN@rt.debian.org : attach correspondence to ticket (verbose)
# - rt+NNNN-quiesce@rt.debian.org : attach correspondence to ticket (quiesce)
# - rt+NNNN-<action>@rt.debian.org : attach correspondence to ticket (some action)