Hi all,
I just follow this how to 
Keep a copy of all emails  http://wiki.contribs.org/SME_Server:Documentation:FAQ#Keep_a_copy_of_all_emailsI ran 
config setprop qpsmtpd Bcc enabled
config setprop qpsmtpd BccMode bcc
signal-event email-updateI was able to see all emails (sent & received) on maillog mailbox (horde) After that, I ran a yum update via server-manager, performed a reboot, and after that 
I got no email in maillog mailbox.db configuration show qpsmtpd:
qpsmtpd=service
    BadCountries=RU,PL,CZ    
Bcc=enable    BccMode=bcc    BccUser=maillog    DNSBL=enabled
    GeoIP=enabled
    LogLevel=6
    MaxScannerSize=25000000
    RBLList=bl.spamcop.net:combined.njabl.org:dnsbl.ahbl.org:dnsbl-1.uceprotect.net:dnsbl-2.uceprotect.net:list.dsbl.org:multihop.dsbl.org:psbl.surriel.com:zen.spamhaus.org
    RHSBL=enabled
    RequireResolvableFromHost=no
    SBLList=bogusmx.rfc-ignorant.org:multi.surbl.org:black.uribl.com:rhsbl.sorbs.net:bulk.rhs.mailpolice.com:fraud.rhs.mailpolice.com:porn.rhs.mailpolice.com:adult.rhs.mailpolice.com:ex.dnsbl.org
    access=public
    qplogsumm=disabled
    status=enabled
What's wrong ? 
I tried to run again command, but nothing appear on maillog mailbox. 
Any kind of help is welcome. thank you. / shwing