Dear P’Nueng,As discussed, I would

Dear P’Nueng,

As discussed, I would request to increase my mail size(Inbox- Sent) capacity from 5MB to 10MB due to many mails with large file attachments.

ผลลัพธ์ (อังกฤษ) 2:

Dear P'Nueng, As discussed, I would Request to increase mail My Size (Inbox- Sent) from 5MB to 10MB capacity Due to many mails with Large Attachments file.