Ich finde es überhaupt schlecht, wenn der Email Client das vor dem versenden "hard" umbricht. Was soll denn das. Der Empfänger soll einfach selbst entscheiden wo umgebrochen wird.

Rantanplan: Das Problem ist, dass Apple Mail bei mir irgendwie eine url www.blabal.de/addfa/asdfa/.../asdfda usw umbricht und wohl im Umbruch sogar ein space einfügt?!

Aber warum kann man den automatischen Zeilenumbruch nicht schon während des Verfassens herbeiführen, so daß man nicht im nachhinein die Formatierung nachbessern muß ?

4.1. Generating Format=Flowed

When generating Format=Flowed text, lines SHOULD be shorter than 80
characters. As suggested values, any paragraph longer than 79
characters in total length could be wrapped using lines of 72 or
fewer characters. While the specific line length used is a matter of
aesthetics and preference, longer lines are more likely to require
rewrapping and to encounter difficulties with older mailers. It has
been suggested that 66 character lines are the most readable.

(The reason for the restriction to 79 or fewer characters between
CRLFs on the wire is to ensure that all lines, even when displayed by
a non-flowed-aware program, will fit in a standard 80-column screen
without having to be wrapped. The limit is 79, not 80, because while
80 fit on a line, the last column is often reserved for a line-wrap
indicator.)

When creating flowed text, the generating agent wraps, that is,
inserts 'soft' line breaks as needed. Soft line breaks are added
between words. Because a soft line break is a SP CRLF sequence, the
generating agent creates one by inserting a CRLF after the occurance
of a space.

A generating agent SHOULD NOT insert white space into a word (a
sequence of printable characters not containing spaces). If faced
with a word which exceeds 79 characters (but less than 998
characters, the [SMTP] limit on line length), the agent SHOULD send
the word as is and exceed the 79-character limit on line length.