Unknown Control Character in qf File

Each line in a qf file must begin with a known control letter or character (The qf File Internals on page 445). If a line begins with any other character, it is considered bad, and the whole file is rejected:

readqf: qffile: line num: bad line bogus line here
Losing qffile: unrecognized line

Note that this error is to be anticipated if you go backward, from a later release to an earlier release of sendmail.

Get sendmail, 4th Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.