It would be correct to say that they send messages to each other often. You could also say, they send messages to other people, often. It makes no sense to say they send messages to other.
Irene awesome translated to Japanese as 'Airīn subarashii'
Irene Pollin's birth name is Irene Lee Kercheck.
Irene Dubrovsky has written: 'Irene Dubrovsky'
Irene Prador's birth name is Peiser, Irene.
Irene Ware's birth name is Ahlberg, Irene.
Irene Saltern's birth name is Irene Stern.
Irene Galter's birth name is Patuzzi, Irene.
Irene Fenwick's birth name is Frizzel, Irene.
Irene Ambrus's birth name is Klopfer, Irene.
Irene Anders's birth name is Irene Swartz.
Irene Castle's birth name is Foote, Irene.
Irene Spencer's birth name is Irene Kunz.