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.