feedmail-debug-sit-for

feedmail-debug-sit-for is a variable defined in `feedmail.el'.
Its value is

0

Documentation:
Duration of pause after feedmail-debug messages.
After some messages are divulged, it may be helpful to pause before
something else obliterates them. This value controls the duration of
the pause. If the value is nil or 0, the sit-for is not done, which
has the effect of not pausing at all. Debug messages can be seen after
the fact in the messages buffer.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.1 of Emacs.