I can receive email but not send

Erick Vallenas

• February 16, 2017 01:16

Hello, I can't send emails in my VPS, I check the Iptables and port 25 is open:
[root@server /]# iptables -L -n Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:25 cP-Firewall-1-INPUT all -- 0.0.0.0/0 0.0.0.0/0 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED Chain FORWARD (policy ACCEPT) target prot opt source destination cP-Firewall-1-INPUT all -- 0.0.0.0/0 0.0.0.0/0 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited Chain OUTPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:25 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:25 Chain cP-Firewall-1-INPUT (2 references) target prot opt source destination ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:53 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2086 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:143 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:8080 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:443 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:995 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2087 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:587 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:993 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2096 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:26 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:25 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2083 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2080 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2079 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:110 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2082 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2095 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2078 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:2077 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:21 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:80 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:3306 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:465 ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 state NEW udp dpt:53
But I can't telnet port 25:
telnet aspmx.l.google.com 25 Trying 209.85.xxx.xx... telnet: connect to address 209.85.xxx.xx: Connection timed out Trying 2607:f8b0:4001:c0a::1a... telnet: connect to address 2607:f8b0:4001:c0a::1a: Network is unreachable
This is the email log:
LOG: MAIN cwd=/usr/local/cpanel/whostmgr/docroot 4 args: /usr/sbin/exim -v -M 1ce2eO-0006qA-WB delivering 1ce2eO-0006qA-WB Connecting to aspmx.l.google.com [173.194.xxx.xx]:25 ... failed: Connection timed out (timeout=5m) LOG: MAIN H=aspmx.l.google.com [173.194.xxx.xx] Connection timed out LOG: MAIN == info@example.net R=dkim_lookuphost T=dkim_remote_smtp defer (110): Connection timed out
Please can you help me?

• 

  cPanelMichael

  • February 16, 2017 13:17

  Hello, I recommend reaching out to your data center or hosting provider to verify if there's anything filtering port 25 traffic in their network or firewall rules. Providers will often block port 25 as a SPAM prevention technique. Thank you.

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