"umlauts" in email-subject

[Anon]

Hi there. I need to send umlauts(öäü) in my E-Mail-subjects (yes because I'm German), but they need to be encoded.
When I send an email with Outlook, it converts "Urlaub ist schön" to
Subject: =?iso-8859-1?Q?Re:_Urlaub_ist_sch=F6n?=
How can I do that encoding by myself or is there a special function for that ??

[Anon]

You have to encode the subject first:
$subject = base64_encode($subject);
And then include the following chars:
$subject = "=?iso-8859-1?B?$subject?=";
That is all!

Kanitro