I have some problems with the email-class.

..
$subject = strip_tags($data["Betreff"]);
..
$email = new Email($from, $to, $subject, $body);
$email->send();

1.) Problems with special chars in subject
Because I am german, the subject can contain letters like ä,ü,ß,...
These characters are shown corretly in Outlook.
But Spamassassin says SUBJ_ILLEGAL_CHARS
I tried
$subject = strip_tags(utf8_decode($data["Betreff"]))
but then these letters are missing in outlook.
How can i use these letters in a correct way?

2.) Problem boundary
Spamassassin additionaly doesnt like MIME_BOUND_NEXTPART.
In sapphire/email/Mailer.php there is

$separator = "----=_NextPart_" . ereg_replace('[^0-9]','',rand() * 10000000000);

If I just edit this to

$separator = "----=_NexxtPart_" . ereg_replace('[^0-9]','',rand() * 10000000000);

I dont get this spamassassin-message any more.

Without this fix my email gets (in combination with 1.), spam-level: mid.
So with the fix it has spam-level: low.
But I would like send mails that are not considered as spam.

3.) if i only want to send plain-emails, i use

..
$subject = strip_tags($data["Betreff"]);
..
$email = new Email($from, $to, $subject, $body);
$email->sendPlain();

If i check the Header in Outlook i see:

Content-Type: multipart/mixed; boundary="----=_NextPart_204854279719"
Content-Transfer-Encoding: 7bit

Is this the right Content-Type for a message that consists only of Plain Text?

Many Questions at once.
Thanks for every help.

(see http://mrfoo.de/archiv/447-Spamassassin-Statusmessages.html for meaning of messages)

Ok, the following 2 changes helped me.
I am working with 2.3.1.
So maybe in 2.3.3 the problems do not occur.

1) In sapphire/email/mailer.php

line 254 : $separator = "----=_NexxtPart_" . ereg_replace('[^0-9]','',rand() * 10000000000);
(any change should do it)

2) If your subject might contain special Chars (deutsche Umlaute)

...
$subject = '=?UTF-8?B?'.base64_encode($subject).'?=';
...
$email = new Email($from, $to, $subject, $body);

As you can see , spamassassin likes it.