contchar, contposition)
The contposition keyword specifies the point at which
batch SMTP lines are folded onto a continuation line. The default value
for contposition is 0, which disables continuation lines.
The contchar keyword is used to specify a continuation
character for commands in batch SMTP. Commands longer than
contposition characters long will have the character
specified by the integer argument to contchar inserted in
the contposition position and the remainer of the line
will be wrapped to another line. The default value for
contchar is 0.