Joke Collection Website - Blessing messages - Why can't MMS be received when it is sent to the mailbox? What problem?

Why can't MMS be received when it is sent to the mailbox? What problem?

First, maybe the address you entered is wrong! Sent it to another mailbox! !

Second, due to network reasons, it will take some time! !

Third, maybe the file you sent has bad information and has been filtered (unlikely)! !

Fourth, the information you sent was considered as spam by the email system and put in the spam! ! !