Setting the Charset for outgoing mail in Mail

Question

When I send mails to windows-systems, the Outlook program gets the message with wrong characters. Especially of course the special danish characters, but also other information goes wrong. F.ex. grey lines hows up where I certainly did not put it!
I have noticed, that the header of the message from Mail is like this:
--Apple-Mail-1--672517002
Content-Transfer-Encoding: 7bit
Content-Type: text/plain;
charset=US-ASCII;
delsp=yes;
format=flowed
Sometimes like this:
--Apple-Mail-9--596884052
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=UTF-8;
delsp=yes;
format=flowed
When using the HTML functionality in Mail I get headers like this:
--Apple-Mail-2--619494695
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=WINDOWS-1252;
delsp=yes;
format=flowed
And the HTML-mails show's correctly!
I guess it is an charset issue, but how can I control that maually?

Answer 1

Open your Mail.app
From the top of your screen choose Window>Connection Doctor.
Double click on each server and make sure the password field is filled out, (your smtp server is likely to be missing the password)
Enter the password into the field you find empty and close the preferences windows (saving changes if prompted) and close the Connection Doctor.
Test to make sure you are fixed.
If issues continue its going to be an issue with Keychain Access and you will need additional steps.
EE