Description of problem:
Probably called by rpm
SELinux is preventing procmail from using the 'dac_override' capabilities.

*****  Plugin dac_override (91.4 confidence) suggests   **********************

If you want to help identify if domain needs this access or you have a file with the wrong permissions on your system
Then turn on full auditing to get path information about the offending file and generate the error again.
Do

Turn on full auditing
# auditctl -w /etc/shadow -p w
Try to recreate AVC. Then execute
# ausearch -m avc -ts recent
If you see PATH record check ownership/permissions on file, and fix it,
otherwise report as a bugzilla.

*****  Plugin catchall (9.59 confidence) suggests   **************************

If you believe that procmail should have the dac_override capability by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'procmail' --raw | audit2allow -M my-procmail
# semodule -X 300 -i my-procmail.pp

Additional Information:
Source Context                system_u:system_r:procmail_t:s0
Target Context                system_u:system_r:procmail_t:s0
Target Objects                Unknown [ capability ]
Source                        procmail
Source Path                   procmail
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    <Unknown>
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.16.7-100.fc26.i686+PAE #1 SMP
                              Wed May 2 22:19:22 UTC 2018 i686 i686
Alert Count                   4
First Seen                    2018-05-16 08:38:18 CEST
Last Seen                     2018-05-18 06:30:09 CEST
Local ID                      b1e8469a-33ad-4bb7-8669-07a2db05f0c6

Raw Audit Messages
type=AVC msg=audit(1526617809.818:285): avc:  denied  { dac_override } for  pid=6700 comm="procmail" capability=1  scontext=system_u:system_r:procmail_t:s0 tcontext=system_u:system_r:procmail_t:s0 tclass=capability permissive=0


Hash: procmail,procmail_t,procmail_t,capability,dac_override


Additional info:
component:      selinux-policy
reporter:       libreport-2.9.5
hashmarkername: setroubleshoot
kernel:         4.16.7-100.fc26.i686+PAE
type:           libreport