AnyEvent::XMPP::Ext::Receipts(3pm) on Linux
The text 80182d386013, as Debian 11 (Bullseye), Debian 10 (Buster) shipped it.
XEP-0184 message receipts
The text 80182d386013, as Debian 11 (Bullseye), Debian 10 (Buster) shipped it.
XEP-0184 message receipts