to e-mail back
[phrase form: e-mail]
01
メールで返信する, 返信メールを送る
to respond to an email message by sending a reply or answer to the sender's original email address
例
I received an important inquiry, and I will email back as soon as I gather all the necessary information.
重要な問い合わせを受け取りました。必要な情報をすべて集め次第、メールで返信します。
