.TH s/qmail: xqp 1 .SH NAME xqp \- locate a message given its qp .SH SYNTAX .B xqp .I qp .SH DESCRIPTION .B xqp reads message lines and delivery lines printed by .BR matchup . It prints the lines that involve messages with long-term queue identifier .IR qp . Long-term queue identifiers are not permanent identifiers. They are based on process IDs; 15-bit process IDs can easily wrap around in less than an hour on a busy system. .SH "SEE ALSO" matchup(1)