139 what should I do if my mobile phone receives an email without a SMS reminder?

139 Log in to the computer, set it in the reminder, and there will be a SMS reminder. Change it to "ordinary short message" (70 words) and all emails will be reminded. If it is set to "long short message" (350 characters), if the message is more than 350 characters, there will be no SMS reminder for the message. So I used a short one, showing only the sender and the subject of the email, but not the content.