Thi is probably my MTA (qmail) but not sure. Composed mails sent are being given two line breaks for a line break it
seams (or wrong separator being used?).

Eg this:

It is a long established fact that a reader will be distracted by the
readable content of a page when looking at its layout. The point of using
Lorem Ipsum is that it has a more-or-less normal distribution of letters,
as opposed to using 'Content here, content here', making it look like
readable English. Many desktop publishing packages and web page editors
now use Lorem Ipsum as their default model text, and a search for 'lorem
ipsum' will uncover many web sites still in their infancy. Various
versions have evolved over the years, sometimes by accident, sometimes on
purpose (injected humour and the like).

Shows as:

It is a long established fact that a reader will be distracted by the

readable content of a page when looking at its layout. The point of using

Lorem Ipsum is that it has a more-or-less normal distribution of letters,

as opposed to using 'Content here, content here', making it look like

readable English. Many desktop publishing packages and web page editors now

use Lorem Ipsum as their default model text, and a search for 'lorem ipsum'

will uncover many web sites still in their infancy. Various versions have

evolved over the years, sometimes by accident, sometimes on purpose

(injected humour and the like).

Any advice appreciated.

Rgs, Chris