So a customer had flushed his iptables rules, and sadly wasn’t able to use SMTP and POP. So I put together this basic tutorial explaining how to do it!<\/p>\n
\r\n\r\nThe following ports are used for mail commonly:\r\n\r\nSMTP \t587\r\nPOP \t110\r\nPOPS \t995\r\nIMAP \t143\r\nIMAP3 \t993\r\n\r\nTo add these ports to the firewall rules;\r\n\r\n# Allows SMTP access\r\n\r\niptables -A INPUT -p tcp --dport 25 -j ACCEPT \r\n\r\n# Allows pop and pops connections \r\n\r\niptables -A INPUT -p tcp --dport 110 -j ACCEPT\r\niptables -A INPUT -p tcp --dport 995 -j ACCEPT\r\n\r\n# Allows imap and imaps connections \r\n\r\niptables -A INPUT -p tcp --dport 143 -j ACCEPT\r\niptables -A INPUT -p tcp --dport 993 -j ACCEPT\r\n\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"So a customer had flushed his iptables rules, and sadly wasn’t able to use SMTP and POP. So I put together this basic tutorial explaining how to do it! The following ports are used for mail commonly: SMTP 587 POP … Continue reading