body for an email which will be stripped when sent with SwiftMailer

gistfile1.txt

Mail will be stripped due to the length of THIS line and the dot.

Apparently, this line will not be sent due to the exact length of the previous line, the trailing dot and two newlines, no matter which kind of newlines (Windows/UNIX) will be used.

This one (using a different MTA) is correct:

Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

Mail will be stripped due to the length of THIS line and the dot=
..

Apparently, this line will be cut off due to the exact length=
 of the previous line, the trailing dot, and two newlines.

in detail:

61 6E 64 20 74 68 65 20 64 6F 74   and the dot
3D 0D 0A 2E 2E 0D 0A 0D 0A         =........
41 70 70 61 72 65 6E 74 6C 79      Apparently

Failing case:

0x0070:                           743d 0d0a 2e0d            t=....
0x0080:  0a0d 0a41 616d 656e 737a 7573 6174 7a20  ...A