[Translation from Japanese to Native English ] There might be cases whereby the inbox size of your mail address is too small...

Additional info

スマホアプリの翻訳です。

Original text

利用しているメールアドレスのメールボックスサイズが小さい場合は送信できないことがあります。
また、送り先のメールアドレスのメールボックスがエクセルファイルを受け取れないこともあります。
なるべく容量が大きく、添付ファイルを受け取れるメールアドレスを使いましょう。　

Translation / English

There might be cases whereby the inbox size of your mail address is too small.
Also, The sent mail address inbox is unable to accept excel files.
As much as possible kindly use mail address that allow file attachments and have a large capacity.

Translation / English

There is a possibility that it may not arrive if the mail box you have has a small capacity.
Also, there are some mail boxes that do not accept the .csv file format.
As much as possible ensure your mailbox is large enough and can accept the attachments.