socket bind() to port 25 for address (any IPv4) failed

[xstocler]

Hello dear friends,

I stopped receiving emails, after checking the debug with the command

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exim -bd -d

the following log is returning me

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16316   socket bind() to port 25 for address (any IPv4) failed: Address already in use: waiting 30s before try                                                                 ing again (9 more tries)
16316 LOG: MAIN
16316   socket bind() to port 25 for address (any IPv4) failed: Address already in use: waiting 30s before try                                                                 ing again (8 more tries)
16316 LOG: MAIN
16316   socket bind() to port 25 for address (any IPv4) failed: Address already in use: waiting 30s before try                                                                 ing again (7 more tries)

listening to port 25, I have

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/bin/netstat -lnp | grep 25 

tcp        0      0 0.0.0.0:25            0.0.0.0:*               LISTEN      16311/exim

Status service

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[root@fw ~]# service exim status
Redirecting to /bin/systemctl status exim.service
● exim.service - Exim Mail Transport Agent
   Loaded: loaded (/usr/lib/systemd/system/exim.service; enabled; vendor preset: disabled)
   Active: active (running) since Thu 2020-04-02 14:14:03 -03; 51min ago
  Process: 2797 ExecStartPre=/usr/libexec/exim-gen-cert (code=exited, status=0/SUCCESS)
 Main PID: 2816 (exim)
   CGroup: /system.slice/exim.service
           └─2816 /usr/sbin/exim -bd -q1h

Apr 02 14:14:03 **** systemd[1]: Starting Exim Mail Transport Agent...
Apr 02 14:14:03 **** systemd[1]: Started Exim Mail Transport Agent.

I don't know what to do, help me