When sending an email to a server, mail bounced with the following error message. Action: failed Status: 5.7.0 Remote-MTA: dns; mail01.riedelbau.de Diagnostic-Code: smtp; 530 5.7.0 Must issue a STARTTLS command first To fix the error, first enabled debug in postfix for the Remote-MTA, for this, edit file vi /etc/postfix/main.cf Add the following lines. You need … Read more
To stop spam using RBL in postfix, edit main.cf vi /etc/postfix/main.cf Add smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_invalid_hostname, reject_unauth_pipelining, reject_non_fqdn_sender, reject_unknown_sender_domain, reject_non_fqdn_recipient, reject_unknown_recipient_domain, reject_rbl_client cbl.abuseat.org, reject_rbl_client bl.spamcop.net, reject_rbl_client sbl.spamhaus.org, reject_rbl_client zen.spamhaus.org, permit Restart postfix systemctl restart postfix See postfix
To enable postfix, run postconf -e “home_mailbox = Maildir/” systemctl restart postfix You can do it by editing /etc/postfix/main.cf vi /etc/postfix/main.cf Add home_mailbox = Maildir/ if home_mailbox entry already in main.cf file, then modify instead of adding a new entry. Virtual Mailbox If you are using virtual mailbox, make sure you spedify folder in your … Read more
When sending email from a Plesk server, i get error Aug 11 19:49:28 vmi274961 postfix/smtp[29276]: E413C3320265: to=, relay=none, delay=0.47, delays=0.47/0/0/0, dsn=4.4.1, status=deferred (connect to 127.0.0.1[127.0.0.1]:10024: Connection refused) This is beccause amavis service is not running. It is supposed to be run in port 10024 When i try to start amavis service, i get error Aug … Read more
On a CentOS server, when sending mail from PHP scripts, mail failed to work. On checking postfix log file (/var/log/maillog), i see following error. Aug 11 01:41:53 forums postfix/sendmail[44463]: fatal: open /etc/postfix/main.cf: Permission denied To fix this, disable selinux setenforce 0 To permanantly disable SELinux, run sed -i ‘s/SELINUX=enforcing/SELINUX=disabled/’ /etc/selinux/config
On an Ubuntu Server, i done following to setup email forwarding. Install postfix apt -y install postfix Edit /etc/postfix/main.cf, add following vi /etc/postfix/main.cf Add virtual_mailbox_domains = YOUR-DOMAIN_HERE.com virtual_mailbox_base = /var/mail/vhosts virtual_mailbox_maps = hash:/etc/postfix/vmailbox virtual_minimum_uid = 100 virtual_uid_maps = static:5000 virtual_gid_maps = static:5000 virtual_alias_maps = hash:/etc/postfix/virtual Create Virtual mailbox vi /etc/postfix/vmailbox Add user1@YOUR-DOMAIN_HERE.com YOUR-DOMAIN_HERE.com/user1 Create alias … Read more
Default mail attachment size in iredmail is 10 MB. To increase mail attachment size, login to server as user root, run following commands postconf -e message_size_limit=104857600 postconf -e mailbox_size_limit=104857600 systemctl restart postfix Here 104857600 is 100 MB in bytes (100 * 1024 * 1024). Change this as required. Sending very large file using mail attachment … Read more
To disable IPv6 on the postfix mail server, edit vi /etc/postfix/main.cf Find inet_protocols = all Replace with inet_protocols = ipv4 Restart postfix systemctl restart postfix Method 2 postconf -e inet_protocols=ipv4 systemctl restart postfix To see the current configuration, run [root@server ~]# postconf inet_protocols inet_protocols = ipv4 [root@server ~]#
Install postfix apt update apt install postfix libsasl2-modules Create file touch /etc/postfix/sasl_passwd chmod 600 /etc/postfix/sasl_passwd vi /etc/postfix/sasl_passwd Add [smtp.gmail.com]:587 user@gmail.com:password Save and exit editor. Run postmap /etc/postfix/sasl_passwd Edit postfix configuration file vi /etc/postfix/main.cf Find and remove relayhost = At end of the file, add relayhost = [smtp.gmail.com]:587 smtp_use_tls = yes smtp_sasl_auth_enable = yes smtp_sasl_security_options = … Read more
To delete emails from a particular user from postfix mail queue, run postqueue -p | grep USER_HERE | cut -d’ ‘ -f1 | postsuper -d – See postfix
Install postfix with apt-get update && apt-get install postfix libsasl2-modules -y Update postfix config with sed -i “s/default_transport = error/# default_transport = error/g” /etc/postfix/main.cf sed -i “s/relay_transport = error/# relay_transport = error/g” /etc/postfix/main.cf sed -i “s/relayhost =/# relayhost =/g” /etc/postfix/main.cf Edit vi /etc/postfix/main.cf Add to end of the file relayhost = [SMTP_SERVER_NAME]:587 smtp_tls_security_level = encrypt … Read more
postconf allow you to list/change postfix configuration. To list current config, run postconf -n To change a configuration, run postconf -e home_mailbox=Maildir/ postfix