HOME

RedHat/Mail

1- Network	2- Postfix	3- Dovecot	4- Postfixadmin	5- PostfixMariaDB	6- DovecotMariaDB
7- RelaySmtp	8- Troubleshoot	9- Selinux	10- GnomeShell	11- Backup

8. Troubleshooting.

8.1 New installation with RedHat 9.5.

January 29, 2025. I did a clean install again.

8.2 Updated php-fpm-8.3.11-1 August 28, 2024

• You have after open session.

Invalid token (session timeout; refresh the page and try again?)   

cd /var/lib/php
Change apache group by nginx .
chgrp -R nginx opcache
chgrp -R nginx session
chgrp -R nginx wsdlcache
systemctl restart php-fpm

8.3 Updated August 2, 2024

Installation from Red Hat 9.4.
Beware,there are differences with Almalinux 9.4.
But easily found.

Only checked on Ipad version IOS 15.6.
The email password must be strong and at least 8 characters.
The duration of the self-signed certificate must be one year only.

Usually I can select "trust" when the self-signed certificate is displayed on the Ipad.
This is no longer possible.
This may be a bug in IOS 15.6 and also is IOS 18.
The mail configuration on IOS 18 will be done in the apps.

8.4 Update april 25,2024.

8.4.1. Update MariaDB.

vi /etc/yum.repos.d/mariadb.repo
Change baseurl 11.X by the latest version MariaDB.
dnf update
Answer "no".
dnf remove MariadDBserver
dnf install MariaDB-server
systemctl enable --now mariadb
mariadb-upgrade -u root -p

8.4.2. Remove all old kernel`

Find your kernel.
uname -a
See free space.
df /boot
ls -l /boot
List kernels.
rpm -qa| grep kernel-core
Remove old kernel.
dnf remove kernel-core-XX
Now see free space.
df /boot

8.4.3 All update.

dnf update
Answer "yes".
reboot

8.4 Update december 18,2023.

vi /etc/crontab
delete # at the line @reboot root setenforce 0 
# disable all services 
systemctl disable httpd  
systemctl  disable mariadb
systemctl disable php-fpm
systemctl disable postfix
systemctl disable dovecot
reboot
dnf update
#update MariaDB - Perhaps you remove old MariaDb-server  
curl -LsS https://r.mariadb.com/downloads/mariadb_repo_setup | bash 
dnf update 
mariadb-upgrade -u root -p
# update PHP 8.3
dnf install http://fr2.rpmfind.net/linux/remi/enterprise/remi-release-9.2.rpm  
dnf module reset php 
dnf module enable php:remi-8.3 
dnf update 
vi /etc/crontab
add # at the line #@reboot root setenforce 0
reboot
# enable all services
systemctl enable --now mariadb   
systemctl status mariadb  
systemctl enable --now httpd  
systemctl status httpd  
systemctl enable --now php-fpm  
systemctl status php-fpm  
systemctl enable --now postfix  
systemctl status  postfix  
systemctl enable --now dovecot  
systemctl status dovecot  
reboot
# all is well

8.5 Service Postfix.

Bug resolved with version postfix-3.5.9-24.el9.x86_64 (2024-03-31).

systemctl status postfix
The postfix service status displays this message.
restorecon[4541]: /usr/sbin/restorecon: lstat(/var/spool/postfix/pid/master.pid) failed: No such file or director
The solution to remove this message.
systemctl stop postfix
systemctl disable postfix
vi /usr/lib/systemd/system/postfix.service
Add a line.

ExecStartPre=-/usr/bin/touch /var/spool/postfix/pid/master.pid  

Before the line below.

ExecStartPre=-/usr/sbin/restorecon -R /var/spool/postfix/pid/master.pid  

systemctl enable --now postfix
systemctl status postfix
reboot and recheck postfix status.

8.6 Automatic restart.

If for some reason the dovecot or postfix services would be stopped.

8.6.1 dovecot.

mkdir -p /etc/systemd/system/dovecot.service.d
vi /etc/systemd/system/dovecot.service.d/custom.conf

#linuxbabe  Xiao Guoan  
[Service]  
Restart=always  
RestartSec=5s  

systemctl daemon-reload
test: pkill dovecot
wait 5 s.
systemctl status dovecot

8.6.2 Postfix.

mkdir -p /etc/systemd/system/postfix.service.d
vi /etc/systemd/system/postfix.service.d/custom.conf

#linuxbabe  Xiao Guoan  
[Service]  
Restart=on-failure  
RestartSec=5s  

systemctl daemon-reload
test: pkill master
wait 5 s.
systemctl status postfix

8.6 Command list.

• Purge all queues.
  postsuper -d ALL
• Queues list.
  postqueue -p
• Mail Server : Mail Log Report : pflogsumm.
  dnf -y install postfix-perl-scripts
  Generate mail log summary for yesterday.
  perl /usr/sbin/pflogsumm -d yesterday /var/log/maillog