Nikos, if you can't use the smtp server at mail.superhost.gr, or if that has the same restrictions I may have a solution for you. This is a bit off-topic on the Python list/group, s I will throw in a line of Python code to make it on-topic :)
I suppose you have the following reasons to want to have the original email address in the message: (1) so that you can see who sent the message, (2) so that you can reply to the original sender. Let's say that the from address was u...@example.com Problem 1 can be solved in two ways: (a) Just put the email address in front of the subject line, like: Subject: (From u...@example.com) Original subject line (b) This solution is a bit more tricky. - Get a separate email address that you use for these messages, like ni...@hotmail.com. Register this as one of your email addresses in gmail. For this it must be a real email address that belongs to you, not a fake address. When it is registered with gmail, gmail will not change it if found in a From header. Make sure that Thunderbird DOES NOT KNOW that this email address belongs to you (i.e. don't use this email address for normal work). Gmail will send you a message to this address to verify that it belongs to you so you must access it through some other means, like a web interface. - Now in the generated email you put the original sender in the comment and your new email address as the real address like: From: "u...@example.com" <ni...@hotmail.com> Because Thunderbird doesn't know ni...@hotmail.com it will display the other one, u...@example.com. Make sure that the email address doesn't contain a quote character. Better still check that only legal characters are used. Problem 2 can easily be solved by adding a Reply-To header with the original from address. Gmail will not change this. So the code becomes something like: MESSAGE = "From: \"{0}\" <ni...@hotmail.com>\r\n" "Reply-To: {0}\r\n" "To: {1}\r\n" "Subject: (From {0}) {2}\r\n\r\n{3}\r\n".format(FROM, TO, SUBJECT, MESSAGE) In my opinion a better solution would be to filter your mesaage through procmail or similar on your receiving computer. For example put the from address in an X-From header and let the filter replace the From header with the address from the X-From. -- Piet van Oostrum <p...@vanoostrum.org> WWW: http://pietvanoostrum.com/ PGP key: [8DAE142BE17999C4] -- https://mail.python.org/mailman/listinfo/python-list