Will the mailbox reject SMS?

E-mail and SMS are different ways of communication. E-mail is mainly used to send and receive e-mail, while short messages are short messages sent and received through mobile communication networks. Email generally does not reject SMS, because it is a different system and protocol. Mailbox mainly depends on mail server and mail protocol (such as POP3, IMAP, SMTP), while mobile phone short messages are transmitted through the short message center of mobile communication operators. Therefore, under normal circumstances, the mailbox will not refuse mobile phone text messages.