dreieck [1] filed a deletion request for tmpsms [2]: The service this package uses does no longer exist and work: https://github.com/sdushantha/tmpsms/commit/06bd6b0fc89485096ec51dede3f72806c158daac
[1] https://aur.archlinux.org/account/dreieck/ [2] https://aur.archlinux.org/pkgbase/tmpsms/
