公司的郵件上限是 100MB 的,所以這次不能一次過給你,當分開幾次給你之後,請自行組合一起.
Because there is a limit/maximum (上限) of 100MB for all outgoing emails from my company's mailbox, I can't email it (the file) to you in one message (一次過給你). However, I will separate it into smaller files and send them to you in several emails. Please kindly put the files together by yourself (自行組合).
Company's mail upper limit is 100MB, therefore this time cannot a time give you, when after separating several times for you, please voluntarily combine the same place.