Joke Collection Website - Blessing messages - When sending information in the mailbox of 163, why does it show that it was sent successfully at first, but it shows that it was not sent successfully after checking the sending situation? Please, gr

When sending information in the mailbox of 163, why does it show that it was sent successfully at first, but it shows that it was not sent successfully after checking the sending situation? Please, gr

When sending information in the mailbox of 163, why does it show that it was sent successfully at first, but it shows that it was not sent successfully after checking the sending situation? Please, great gods. Successful sending only means that the mail is successfully sent from Netease mail server, but it may still be unsuccessful. For example, the other party's server is closed, the other party's server rejects your IP, or it thinks your email is dangerous and refuses, and the other party's personal email is set to not accept your email.

Please accept it, thank you!