Description of problem:
(Re)started cyrus-imapd.
SELinux is preventing imapd from 'create' accesses on the directory n.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that imapd should be allowed create access on the n directory 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 'imapd' --raw | audit2allow -M my-imapd
# semodule -X 300 -i my-imapd.pp

Additional Information:
Source Context                system_u:system_r:cyrus_t:s0
Target Context                system_u:object_r:cyrus_var_run_t:s0
Target Objects                n [ dir ]
Source                        imapd
Source Path                   imapd
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.14.1-29.fc28.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.16.11-300.fc28.x86_64 #1 SMP Tue
                              May 22 18:29:09 UTC 2018 x86_64 x86_64
Alert Count                   1
First Seen                    2018-05-27 18:51:53 CEST
Last Seen                     2018-05-27 18:51:53 CEST
Local ID                      92342634-513c-488f-b6a8-76b2923d89eb

Raw Audit Messages
type=AVC msg=audit(1527439913.927:21549): avc:  denied  { create } for  pid=27219 comm="imapd" name="n" scontext=system_u:system_r:cyrus_t:s0 tcontext=system_u:object_r:cyrus_var_run_t:s0 tclass=dir permissive=0


Hash: imapd,cyrus_t,cyrus_var_run_t,dir,create

Version-Release number of selected component:
selinux-policy-3.14.1-29.fc28.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.5
hashmarkername: setroubleshoot
kernel:         4.16.11-300.fc28.x86_64
type:           libreport