メール交換 でしょう
mērukōkandeshō
1. Probably by email.; Likely through email exchange.
Noun
#113839
1. Probably by email.; Likely through email exchange.
1. email address
1. diplomat
1. email; e-mail
1. diplomatic mission; overseas diplomatic establishment
1. good feeling; good will
1. exchange; interchange
1. high official
1. airmail; air mail
1. official residence