Correspond

To be like something else in the dimensions and arrangement of its parts; -- followed by with or to; as, concurring figures correspond with each other throughout.

To be adapted; to be congruous; to suit; to agree; to fit; to answer; -- followed by to.

To have intercourse or communion; especially, to hold intercourse or to communicate by sending and receiving letters; -- followed by with.

exchange messages; "My Russian pen pal and I have been corresponding for several years"