> I need to change FROM header value to 'Anonymous' or something. How can I do it? You mean something related to PJSIP itself? Or you just mean "how to change FROM header in e-mail?" If so, you should know that FROM header is just plain text. So, you can easy put to FROM what you want. Also, it means that if you received a message from somebody you cannot be sure there is message really from him. Web interfaces (as far as I know) don't give you oportunuty to change FROM. So, use some e-mail client. Configure your e-mail client and just change your e-mail address. But don't change your username for SMTP/SSL/etc authorization. Also, you can send a message using SMTP protocol directly. For example, using UNIX program "netcat". This is example how to do this: https://dl.dropbox.com/u/8699016/rm-never-netcat-smtp.png . See SMTP RFC for more info: http://www.rfc-editor.org/rfc/rfc2821.txt If you have any questions about this, just ask. ????? ?????, ?????????? ??????????? :)