I am setting up an email server on my home box with postfix and dovecot
My server is modem router and has as such an internal and external network
interface
*From my laptop (LAN)*From Thunderbird I get the message: Could not connect
to server localhost. The connection was refused.
Testing with telnet from CLI I get
(1) telnet home smtp
Trying 10.5.2.1...
telnet: connect to address 10.5.2.1: Connection refused
(2) telnet home imap
Trying 10.5.2.1...
Connected to home.
Escape character is '^]'.
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE
STARTTLS AUTH=PLAIN AUTH=LOGIN] Dovecot ready.
*Testing from server works fine.*telnet localhost imap
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE
STARTTLS AUTH=PLAIN AUTH=LOGIN] Dovecot ready.
telnet localhost smtp
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 home.wo-lar.com ESMTP
The server is listening on port 25, 587 and 465
netstat -plutn | grep 25 and 587
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN
28704/master
tcp 0 0 127.0.0.1:587 0.0.0.0:* LISTEN
21435/smtpd
I can send mails to my gmail account. But when responding to this mail I
get nothing back, not even an error message in gmail (might come later?
I opened the firewall ports too:
Extract from my firewall.
### Allow all Internal traffic to Server
iptables -A INPUT -i $INT_DEV -s $INT_NET -d $INT_NET -j ACCEPT
iptables -A OUTPUT -o $INT_DEV -s $INT_NET -d $INT_NET -j ACCEPT
# New Connection: SMTP and SMTPS (over TLS/SSL)
iptables -A INPUT -i $EXT_DEV -m state --state NEW -m tcp -p tcp --syn
--dport 25 -j ACCEPT
iptables -A INPUT -i $EXT_DEV -m state --state NEW -m tcp -p tcp --syn
--dport 465 -j ACCEPT
# New Connection: IMAP Email Clients (over SSL and non-encrypted)
iptables -A INPUT -i $EXT_DEV -m state --state NEW -m tcp -p tcp --dport
993 -j ACCEPT
iptables -A INPUT -i $EXT_DEV -m state --state NEW -m tcp -p tcp --syn
--dport 143 -j ACCEPT
# Submission
iptables -A INPUT -i $EXT_DEV -m state --state NEW -m tcp -p tcp --dport
587 -j ACCEPT
Any help to solve this issue is welcome.
Thank you
Wolfgang
