I’m now using iPhone and facing a problem of replying email by using my handphone. This problem persists when I stay in HCM, but it seemed to be ok when I travelled to Hanoi last month.
Contact the email provider and get the correct email account settings.
It should not matter what city or country you are in to send email, but there may be other factors which you are not aware are important and have left off.
Retrieving data ...