Odkazy:

http://qmail-support.blogspot.com/2005/05/badmailfrom.html 
http://qmail-support.blogspot.com/  

Qmail: http://www.qmail.org 
Rblsmtpd: http://cr.yp.to/ucspi-tcp/rblsmtpd.html 
Qconfirm: http://smarden.org/qconfirm/ 
Qdated: http://www.palomine.net/qdated/ 
Bernstein, D. J. Moving large sites to qmail: 
http://cr.yp.to/qmail/sendmail.html 

http://smarden.org/qconfirm/  
http://www.palomine.net/qdated
http://cr.yp.to/qmail/sendmail.html 
http://www.tibus.net/pgregg/projects/qmail/single-uid-howto.html 
http://www.qmail.org/qmail-smtpd-relay-rejecthttp://www.nrg4u.com/
http://www.arctic.org/~dean/patches/qmail-0.95-liberal-lf.patch
http://www-dt.e-technik.uni-dortmund.de/~ma/qmail-bugs.html