domino can't bind port 25

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hy community,

i have a problem was not releasable by ibm domino support.
lately i have installed a rhel 7.3 64bit on a hp proliant 8core computer.
on this machine are installed and running a domino server 9.0.1FP7 64bit mail server.
in principle works this domino server fine ( ip and notesprotokoll are running ok - replicate with other main-dominoserver are ok ).
now i have the problem that i can not activate or bind the port 25 and port 80 ( smtp and http ) on
this machine.
• all mailservices (postfix and sendmail ) on rhel are deinstalled (also firewalld).
only local mail service are running:
[root@linlotus ~]# mail
Heirloom Mail version 12.5 7/5/10. Type ? for help.
"/var/spool/mail/root": 2 messages 2 unread

ports normaly free:
[root@linlotus ~]# lsof -i:25
[root@linlotus ~]# lsof -i:80

domino write following error in log:

ERROR: bindsock
2016.12.28 10:43:40 ERROR: bindsock' helper application is missing, not executable, not setuid root, or no sticky bit set
2016.12.28 10:43:40 SMTP Server: Listener failure: 'bindsock' is missing, not executable, not owned by root, not setuid root or user needs net_privaddr privilege.
2016.12.28 10:43:40 Suspending listen task for 20 seconds due to network errors

Unable to bind to port Port = 25 errno = 13 "Permission denied"

dominoserver was installed as root (default) and running as user domino (not root). this ist the prefers install method.
bindsock fileperms on the machine: ( bindsock with acl 4555 and -rwsrwxrwx. 1) not work !

[root@linlotus ~]# find / -name bindsock
/opt/lotus/notes/90010/linux/901FP7/bindsock
/opt/lotus/notes/90010/linux/90010/bindsock
/opt/lotus/notes/90010/linux/bindsock
[root@linlotus ~]# ls -l /opt/lotus/notes/90010/linux/901FP7/bindsock
-rwsrwxrwx. 1 root bin 14832 15. Okt 2013 /opt/lotus/notes/90010/linux/901FP7/bindsock
[root@linlotus ~]# ls -l /opt/lotus/notes/90010/linux/90010/bindsock
-rwsrwxrwx. 1 root bin 14832 15. Okt 2013 /opt/lotus/notes/90010/linux/90010/bindsock
[root@linlotus ~]# ls -l /opt/lotus/notes/90010/linux/bindsock
-rwsrwxrwx. 1 root bin 14832 18. Aug 16:42 /opt/lotus/notes/90010/linux/bindsock

have anyone solved in past this problem ?

thank you very much
willi

WG

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