It dose work!!

But how do you know the problem is net-snmp-agent-libs?
I mean I didn't see any message about that.

Can you tell me how to trouble shooting that?

Thanks for your help.

rpm -qv --whatprovides /lib64/libnetsnmpmibs.so.31.0.2

net-snmp-agent-libs-5.7.2-28.el7_4.1.x86_64

rpm -qv --whatprovides /lib64/libnetsnmpmibs.so.31

net-snmp-agent-libs-5.7.2-28.el7_4.1.x86_64

ls -l /lib64/libnetsnmpmibs.so.31*

lrwxrwxrwx 1 root root 24 Feb  3 16:32 /lib64/libnetsnmpmibs.so.31 -> libnetsnmpmibs.so.31.0.2

-rwxr-xr-x 1 root root  0 Jan 25 23:52 /lib64/libnetsnmpmibs.so.31.0.2

But it showed "No package cryus-imapd available."

You have a typo there...cryus vs cyrus.

What is the output of:

rpm -qv --whatprovides /lib64/libnetsnmpmibs.so.31.0.2

rpm -qv --whatprovides /lib64/libnetsnmpmibs.so.31

ls -l /lib64/libnetsnmpmibs.so.31*

Strange problem!

B.

Amazing!
When I

yum reinstall cyrus-imapd cyrus-sasl-lib cyrus-sasl-plain cyrus-sasl cyrus-imapd-utils

It works!!

(1/5): cyrus-sasl-2.1.26-21.el7.x86_64.rpm                                                                      |  88 kB  00:00:00     

(2/5): cyrus-sasl-plain-2.1.26-21.el7.x86_64.rpm                                                                |  38 kB  00:00:00     

(3/5): cyrus-imapd-2.4.17-8.v7.1.x86_64.rpm                                                                     | 3.6 MB  00:00:01     

(4/5): cyrus-sasl-lib-2.1.26-21.el7.x86_64.rpm                                                                  | 155 kB  00:00:01     

(5/5): cyrus-imapd-utils-2.4.17-8.v7.1.x86_64.rpm                                                               | 247 kB  00:00:01     

Why I just reinstall cyrus-imapd didn't work?

And cyrus-imapd still dosen't work.
So sad.

maillog

Feb 13 22:17:07 server postfix/pickup[18405]: 595FA2000010E: uid=0 from=<root>

Feb 13 22:17:07 server postfix/cleanup[15910]: 595FA2000010E: message-id=<20180213141707.595FA2000010E@takeez.com>

Feb 13 22:17:07 server postfix/cleanup[15910]: warning: ldap:/etc/postfix/imap-aliases.cf is unavailable. open /etc/postfix/imap-aliases.cf: No such file or directory

Feb 13 22:17:07 server postfix/cleanup[15910]: warning: ldap:/etc/postfix/imap-aliases.cf lookup error for "root@takeez.com"

Feb 13 22:17:07 server postfix/cleanup[15910]: warning: 595FA2000010E: virtual_alias_maps map lookup problem for root@takeez.com -- deferring delivery

messagelog

Feb 13 22:19:50 server systemd: Starting Cyrus-imapd IMAP/POP3 email server...

Feb 13 22:19:50 server systemd: Created slice User Slice of cyrus.

Feb 13 22:19:50 server systemd: Starting User Slice of cyrus.

Feb 13 22:19:50 server systemd: Started Session c11 of user cyrus.

Feb 13 22:19:50 server systemd: Starting Session c11 of user cyrus.

Feb 13 22:19:54 server systemd: Removed slice User Slice of cyrus.

Feb 13 22:19:54 server systemd: Stopping User Slice of cyrus.

Feb 13 22:19:54 server systemd: Started Cyrus-imapd IMAP/POP3 email server.

Feb 13 22:19:54 server cyrus-master: /usr/lib/cyrus-imapd/cyrus-master: error while loading shared libraries: /lib64/libnetsnmpmibs.so.31: file too short

Feb 13 22:19:54 server systemd: cyrus-imapd.service: main process exited, code=exited, status=127/n/a

Feb 13 22:19:54 server systemd: Created slice User Slice of cyrus.

Feb 13 22:19:54 server systemd: Starting User Slice of cyrus.

Feb 13 22:19:54 server systemd: Started Session c12 of user cyrus.

Feb 13 22:19:54 server systemd: Starting Session c12 of user cyrus.

Can you give me more help ?

Amazing!
When I

yum reinstall cyrus-imapd cyrus-sasl-lib cyrus-sasl-plain cyrus-sasl cyrus-imapd-utils

It works!!

(1/5): cyrus-sasl-2.1.26-21.el7.x86_64.rpm                                                                      |  88 kB  00:00:00     

(2/5): cyrus-sasl-plain-2.1.26-21.el7.x86_64.rpm                                                                |  38 kB  00:00:00     

(3/5): cyrus-imapd-2.4.17-8.v7.1.x86_64.rpm                                                                     | 3.6 MB  00:00:01     

(4/5): cyrus-sasl-lib-2.1.26-21.el7.x86_64.rpm                                                                  | 155 kB  00:00:01     

(5/5): cyrus-imapd-utils-2.4.17-8.v7.1.x86_64.rpm                                                               | 247 kB  00:00:01     

Why I just reinstall cyrus-imapd didn't work?

And cyrus-imapd still dosen't work.
So sad.

I upload some logs .
Can you give me more help?

Thank you.

Amazing!
When I

yum reinstall cyrus-imapd cyrus-sasl-lib cyrus-sasl-plain cyrus-sasl cyrus-imapd-utils

It works!!

(1/5): cyrus-sasl-2.1.26-21.el7.x86_64.rpm                                                                      |  88 kB  00:00:00     

(2/5): cyrus-sasl-plain-2.1.26-21.el7.x86_64.rpm                                                                |  38 kB  00:00:00     

(3/5): cyrus-imapd-2.4.17-8.v7.1.x86_64.rpm                                                                     | 3.6 MB  00:00:01     

(4/5): cyrus-sasl-lib-2.1.26-21.el7.x86_64.rpm                                                                  | 155 kB  00:00:01     

(5/5): cyrus-imapd-utils-2.4.17-8.v7.1.x86_64.rpm                                                               | 247 kB  00:00:01     

Why I just reinstall cyrus-imapd didn't work?

And cyrus-imapd still dosen't work.
So sad.

I upload some logs .
Can you give me more help?

Thank you.

Reinstalling often does not fix start-up issues if the problem comes from a bad config file as the config file does always not get updated. Can you have a look at /var/log/messages and /var/log/maillog for any error messages?

You have a typo in your command above. Please can you do:

yum reinstall cyrus-imapd cyrus-sasl-lib cyrus-sasl-plain cyrus-sasl cyrus-imapd-utils

This will reinstall the cyrus-imapd packages.