Besides, if you want to be truly anonymous, you can use an anonymous mail forwarder. Remailerreplay.com and remaileranon.efga.org are the e-mail addresses of several anonymous duplicates.
The command format of anonymous mail forwarder is: enter the email address of anonymous mail forwarder -remailerreplay.com in the "To" of the mail.
The format of the message body is: the first line is blank; Write "::"(two colons) on the second line; Write the words "anonymous recipient:" on the third line, followed by the email address of the recipient; The fourth line must be blank; Starting from the fifth line, it can be the text, and the text can be written casually. Also remember, if you use the signature function provided by email software, be sure to turn it off.