Email Connection Timing Out

Hi, I just installed VPS CENTOS 6.8 x86_64 kvm " server WHM 60.0 (build 34) and everything is working great except sending emails. All outgoing emails go into queue and can't be sent. I've tried sending to gmail, hotmail, and yahoo. When I try to delivery it through Mail Queue Manager I get this:


delivering 1cSjWB-0006L0-SA
Connecting to gmail-smtp-in.l.google.com [173.194.198.26]:25 from xx.xx.27.198 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  H=gmail-smtp-in.l.google.com [173.194.198.26] Connection timed out
Connecting to alt1.gmail-smtp-in.l.google.com [173.194.205.26]:25 from xx.xx.27.198 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  H=alt1.gmail-smtp-in.l.google.com [173.194.205.26] Connection timed out
Connecting to alt2.gmail-smtp-in.l.google.com [74.125.141.27]:25 from xx.xx.27.198 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  H=alt2.gmail-smtp-in.l.google.com [74.125.141.27] Connection timed out
Connecting to alt3.gmail-smtp-in.l.google.com [64.233.186.27]:25 from xx.xx.27.198 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  H=alt3.gmail-smtp-in.l.google.com [64.233.186.27] Connection timed out
Connecting to alt4.gmail-smtp-in.l.google.com [209.85.202.26]:25 from xx.xx.27.198 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  H=alt4.gmail-smtp-in.l.google.com [209.85.202.26] Connection timed out
LOG: MAIN
  == someusr@gmail.com R=dkim_lookuphost T=dkim_remote_smtp defer (110): Connection timed out

When I run this but it's not my ip. My ip :


[root@server ~]# cat /etc/resolv.conf
; generated by /sbin/dhclient-script
nameserver 108.61.10.10


[root@server ~]# exim -bt myemail@hotmail.com
myemail@hotmail.com
  router = lookuphost, transport = remote_smtp
  host mx1.hotmail.com [65.55.33.119]   MX=5
  host mx1.hotmail.com [65.55.37.72]    MX=5
  host mx1.hotmail.com [65.55.92.136]   MX=5
  host mx1.hotmail.com [104.44.194.234] MX=5
  host mx1.hotmail.com [65.54.188.126]  MX=5
  host mx1.hotmail.com [104.44.194.235] MX=5
  host mx1.hotmail.com [65.54.188.72]   MX=5
  host mx1.hotmail.com [65.55.92.168]   MX=5
  host mx1.hotmail.com [65.55.33.135]   MX=5
  host mx1.hotmail.com [104.44.194.231] MX=5
  host mx1.hotmail.com [104.44.194.233] MX=5
  host mx1.hotmail.com [207.46.8.167]   MX=5
  host mx1.hotmail.com [65.55.37.88]    MX=5
  host mx1.hotmail.com [104.44.194.236] MX=5
  host mx1.hotmail.com [65.55.92.184]   MX=5
  host mx1.hotmail.com [104.44.194.232] MX=5
  host mx1.hotmail.com [104.44.194.237] MX=5
  host mx1.hotmail.com [134.170.2.199]  MX=5
  host mx1.hotmail.com [65.55.37.104]   MX=5
  host mx4.hotmail.com [65.55.37.120]   MX=5
  host mx4.hotmail.com [65.54.188.110]  MX=5
  host mx4.hotmail.com [65.55.92.152]   MX=5
  host mx4.hotmail.com [207.46.8.199]   MX=5
  host mx4.hotmail.com [65.54.188.94]   MX=5


[root@server ~]# exigrep myemail@hotmail.com /var/log/exim_mainlog
2017-01-15 04:03:04 1cSbsi-0005mZ-Uj H=mx3.hotmail.com [65.55.92.152] Connection timed out
2017-01-15 04:04:07 1cSbsi-0005mZ-Uj H=mx3.hotmail.com [104.44.194.237] Connection timed out
2017-01-15 04:05:10 1cSbsi-0005mZ-Uj H=mx3.hotmail.com [104.44.194.232] Connection timed out
2017-01-15 04:06:13 1cSbsi-0005mZ-Uj H=mx3.hotmail.com [207.46.8.199] Connection timed out
2017-01-15 04:07:16 1cSbsi-0005mZ-Uj H=mx3.hotmail.com [65.54.188.94] Connection timed out
2017-01-15 04:07:16 1cSbsi-0005mZ-Uj == myemail@hotmail.com R=lookuphost T=remote_smtp defer (110): Connection timed out
2017-01-15 04:13:34 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.55.33.135] Connection timed out
2017-01-15 04:14:37 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [104.44.194.235] Connection timed out
2017-01-15 04:15:40 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.55.92.184] Connection timed out
2017-01-15 04:16:43 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.55.37.104] Connection timed out
2017-01-15 04:17:46 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [207.46.8.167] Connection timed out
2017-01-15 04:17:46 1cSbsi-0005mZ-Uj == myemail@hotmail.com R=lookuphost T=remote_smtp defer (110): Connection timed out
2017-01-15 05:13:34 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.54.188.126] Connection timed out
2017-01-15 05:14:37 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.55.33.119] Connection timed out
2017-01-15 05:15:40 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [134.170.2.199] Connection timed out
2017-01-15 05:16:43 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.55.37.72] Connection timed out
2017-01-15 05:17:46 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [104.44.194.233] Connection timed out
2017-01-15 05:17:46 1cSbsi-0005mZ-Uj == myemail@hotmail.com R=lookuphost T=remote_smtp defer (110): Connection timed out
2017-01-15 06:13:34 1cSbsi-0005mZ-Uj H=mx4.hotmail.com [104.44.194.232] Connection timed out
2017-01-15 06:14:37 1cSbsi-0005mZ-Uj H=mx4.hotmail.com [65.55.37.72] Connection timed out
2017-01-15 06:15:40 1cSbsi-0005mZ-Uj H=mx4.hotmail.com [104.44.194.235] Connection timed out
2017-01-15 06:16:43 1cSbsi-0005mZ-Uj H=mx4.hotmail.com [65.54.188.94] Connection timed out
2017-01-15 06:17:46 1cSbsi-0005mZ-Uj H=mx4.hotmail.com [65.55.92.184] Connection timed out
2017-01-15 06:17:46 1cSbsi-0005mZ-Uj == myemail@hotmail.com R=lookuphost T=remote_smtp defer (110): Connection timed out
2017-01-15 06:45:59 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [104.44.194.235] Connection timed out
2017-01-15 06:47:02 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [104.44.194.231] Connection timed out
2017-01-15 06:48:05 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [104.44.194.237] Connection timed out
2017-01-15 06:49:08 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [104.44.194.233] Connection timed out
2017-01-15 06:50:11 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.54.188.72] Connection timed out
2017-01-15 06:50:11 1cSbsi-0005mZ-Uj == myemail@hotmail.com R=lookuphost T=remote_smtp defer (110): Connection timed out
2017-01-15 07:16:28 1cSbsi-0005mZ-Uj removed by root
2017-01-15 07:16:28 1cSbsi-0005mZ-Uj Completed


[root@server ~]# cat /var/log/exim_mainlog | grep 1cSbsi-0005mZ-Uj
2017-01-15 04:03:04 1cSbsi-0005mZ-Uj H=mx3.hotmail.com [65.55.92.152] Connection timed out
2017-01-15 04:04:07 1cSbsi-0005mZ-Uj H=mx3.hotmail.com [104.44.194.237] Connection timed out
2017-01-15 04:05:10 1cSbsi-0005mZ-Uj H=mx3.hotmail.com [104.44.194.232] Connection timed out
2017-01-15 04:06:13 1cSbsi-0005mZ-Uj H=mx3.hotmail.com [207.46.8.199] Connection timed out
2017-01-15 04:07:16 1cSbsi-0005mZ-Uj H=mx3.hotmail.com [65.54.188.94] Connection timed out
2017-01-15 04:07:16 1cSbsi-0005mZ-Uj == myemail@hotmail.com R=lookuphost T=remote_smtp defer (110): Connection timed out
2017-01-15 04:13:34 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.55.33.135] Connection timed out
2017-01-15 04:14:37 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [104.44.194.235] Connection timed out
2017-01-15 04:15:40 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.55.92.184] Connection timed out
2017-01-15 04:16:43 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.55.37.104] Connection timed out
2017-01-15 04:17:46 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [207.46.8.167] Connection timed out
2017-01-15 04:17:46 1cSbsi-0005mZ-Uj == myemail@hotmail.com R=lookuphost T=remote_smtp defer (110): Connection timed out
2017-01-15 05:13:34 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.54.188.126] Connection timed out
2017-01-15 05:14:37 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.55.33.119] Connection timed out
2017-01-15 05:15:40 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [134.170.2.199] Connection timed out
2017-01-15 05:16:43 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.55.37.72] Connection timed out
2017-01-15 05:17:46 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [104.44.194.233] Connection timed out
2017-01-15 05:17:46 1cSbsi-0005mZ-Uj == myemail@hotmail.com R=lookuphost T=remote_smtp defer (110): Connection timed out
2017-01-15 06:13:34 1cSbsi-0005mZ-Uj H=mx4.hotmail.com [104.44.194.232] Connection timed out
2017-01-15 06:14:37 1cSbsi-0005mZ-Uj H=mx4.hotmail.com [65.55.37.72] Connection timed out
2017-01-15 06:15:40 1cSbsi-0005mZ-Uj H=mx4.hotmail.com [104.44.194.235] Connection timed out
2017-01-15 06:16:43 1cSbsi-0005mZ-Uj H=mx4.hotmail.com [65.54.188.94] Connection timed out
2017-01-15 06:17:46 1cSbsi-0005mZ-Uj H=mx4.hotmail.com [65.55.92.184] Connection timed out
2017-01-15 06:17:46 1cSbsi-0005mZ-Uj == myemail@hotmail.com R=lookuphost T=remote_smtp defer (110): Connection timed out
2017-01-15 06:45:59 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [104.44.194.235] Connection timed out
2017-01-15 06:47:02 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [104.44.194.231] Connection timed out
2017-01-15 06:48:05 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [104.44.194.237] Connection timed out
2017-01-15 06:49:08 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [104.44.194.233] Connection timed out
2017-01-15 06:50:11 1cSbsi-0005mZ-Uj H=mx1.hotmail.com [65.54.188.72] Connection timed out
2017-01-15 06:50:11 1cSbsi-0005mZ-Uj == myemail@hotmail.com R=lookuphost T=remote_smtp defer (110): Connection timed out
2017-01-15 07:16:28 cwd=/usr/local/cpanel/whostmgr/docroot 4 args: /usr/sbin/exim -v -Mrm 1cSbsi-0005mZ-Uj
2017-01-15 07:16:28 1cSbsi-0005mZ-Uj removed by root
2017-01-15 07:16:28 1cSbsi-0005mZ-Uj Completed

When I test for open ports I get this:


21 ftp Open 35
  22 ssh Open 34
  23 telnet Filtered 0
  25 smtp Open 34
  53 dns Open 33
  80 http Open 35
  110 pop3 Open 34
  111 portmapper, rpcbind Filtered 0
  135 Microsoft RPC services Filtered 0
  139 netbios Filtered 0
  143 imap Open 33
  389 ldap Filtered 0
  443 https Open 33
  445 SMB directly over IP Filtered 0
  587 msa-outlook Open 35
  1025 IIS, NFS, or listener RFS remote_file_sharing Filtered 0
  1352 lotus notes Filtered 0
  1433 sql server Filtered 0
  1723 Point-to-point tunnelling protocol Filtered 0
  3306 my sql Open 33
  3389 remote desktop Filtered 0
  5060 Session Initiation Protocol (SIP) Filtered 0
  5900 Virtual Network Computer display 0 Filtered 0
  6001 X Window server Filtered 0
  8080 webcache Refused (RST) 0

Thank you

SysSachin

January 16, 2017 02:53

Hello, Please try to use Google's nameserver. You have to add below nameservers in the /etc/resolv.conf file nameserver 8.8.8.8 nameserver 8.8.4.4

Joef

January 16, 2017 08:29

I added the Google nameservers, strange because I added them when I first installed the program.


[root@server etc]# cat /etc/resolv.conf
; generated by /sbin/dhclient-script
nameserver 8.8.8.8
nameserver 8.8.4.4

But I still get timed out:


LOG: MAIN
  cwd=/usr/local/cpanel/whostmgr/docroot 4 args: /usr/sbin/exim -v -M 1cT3NK-0005rv-AW
delivering 1cT3NK-0005rv-AW
Connecting to mx2.hotmail.com [104.44.194.231]:25 from xx.xx.27.198 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  H=mx2.hotmail.com [104.44.194.231] Connection timed out
Connecting to mx2.hotmail.com [104.44.194.232]:25 from xx.xx.27.198 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  H=mx2.hotmail.com [104.44.194.232] Connection timed out
Connecting to mx2.hotmail.com [65.55.37.88]:25 from xx.xx.27.198 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  H=mx2.hotmail.com [65.55.37.88] Connection timed out
Connecting to mx2.hotmail.com [104.44.194.234]:25 from xx.xx.27.198 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  H=mx2.hotmail.com [104.44.194.234] Connection timed out
Connecting to mx2.hotmail.com [65.55.92.136]:25 from xx.xx.27.198 ... failed: Connection timed out (timeout=5m)
LOG: MAIN
  H=mx2.hotmail.com [65.55.92.136] Connection timed out
LOG: MAIN
  == myemail@hotmail.com R=dkim_lookuphost T=dkim_remote_smtp defer (110): Connection timed out

I tried sending them out from Magento (shopping cart) and through the Webmail interface but still they go into queue. What else can I check? Thanks

January 16, 2017 11:53

Hello, This does look to be a firewall or network issue as something is denying outbound connections on port 25 from your server: Also, Please provide me following command output.
telnet gmail-smtp-in.l.google.com 25

January 16, 2017 14:23

Yeah, that's what I thought but I haven't installed any firewalls thou. Here is the telnet results:


 
[root@server ~]# telnet gmail-smtp-in.l.google.com 25
Trying 173.194.196.26...
telnet: connect to address 173.194.196.26: Connection timed out
Trying 2607:f8b0:4001:c1a::1b...
telnet: connect to address 2607:f8b0:4001:c1a::1b: Network is unreachable

Something does seems to be blocking it.

cPanelMichael

January 16, 2017 16:43

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.

January 16, 2017 17:44

I just done that. Thanks. Weird that the port tester shows it's open.

January 16, 2017 19:19

Weird that the port tester shows it's open.

It's possible the testing application you are using might be testing for incoming traffic over port 25. The issue you are facing relates to outgoing traffic over port 25. Thanks!

January 16, 2017 19:33

It's working!


LOG: MAIN
  cwd=/usr/local/cpanel/whostmgr/docroot 4 args: /usr/sbin/exim -v -M 1cTDju-000272-Mk
delivering 1cTDju-000272-Mk
Connecting to mx2.hotmail.com [104.44.194.236]:25 from xx.xx.xx.198 ... connected
  SMTP<< 220 SNT004-MC10F2.hotmail.com Sending unsolicited commercial or bulk e-mail to Microsoft's computer network is prohibited. Other restrictions are found at http://privacy.microsoft.com/en-us/anti-spam.mspx. Mon, 16 Jan 2017 12:22:26 -0800
  SMTP>> EHLO example.com
  SMTP<< 250-SNT004-MC10F2.hotmail.com (3.21.0.266) Hello [xx.xx.xx.198]
         250-SIZE 36909875
         250-PIPELINING
         250-8bitmime
         250-BINARYMIME
         250-CHUNKING
         250-STARTTLS
         250-AUTH LOGIN
         250-AUTH=LOGIN
         250 OK
  SMTP>> STARTTLS
  SMTP<< 220 SMTP server ready
  SMTP>> EHLO example.com
  SMTP<< 250-SNT004-MC10F2.hotmail.com (3.21.0.266) Hello [xx.xx.xx.198]
         250-SIZE 36909875
         250-PIPELINING
         250-8bitmime
         250-BINARYMIME
         250-CHUNKING
         250-AUTH LOGIN
         250-AUTH=LOGIN
         250 OK
  SMTP>> MAIL FROM: SIZE=31853
  SMTP>> RCPT TO:
  SMTP>> DATA
  SMTP<< 250 orders@example.com....Sender OK
  SMTP<< 250 myemail@hotmail.com
  SMTP<< 354 Start mail input; end with .
  SMTP>> writing message and terminating "."
  SMTP<< 250   Queued mail for delivery
  SMTP>> EHLO example.com
  SMTP>> QUIT
LOG: MAIN
  => myemail@hotmail.com R=dkim_lookuphost T=dkim_remote_smtp H=mx2.hotmail.com [104.44.194.236] X=TLSv1.2:ECDHE-RSA-AES256-SHA384:256 CV=yes C="250   Queued mail for delivery"
LOG: MAIN
  Completed

Thanks

January 16, 2017 19:55

Hello, I'm happy to see the issue is now resolved. Thank you for updating us with the outcome.

hmaddy

April 25, 2021 07:07

Am also facing the same issue on server. port 25 is open.

cPRex Jurassic Moderator

April 26, 2021 16:21

@anoopk350 - did you also check port 25 outbound from the server? One easy test to check that would be to run this command:
telnet mx1.cpanel.net 25
Does that command let you connect to the cPanel mail server when you run it from your server?

jpontang

March 17, 2022 02:05

[root@servers ~]# telnet mx1.cpanel.net 25 Trying 208.74.121.68... Connected to mx1.cpanel.net. Escape character is '^]'. 220-mx1.cpanel.net ESMTP Exim 4.94.2 #2 Wed, 16 Mar 2022 21:03:54 -0500 220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail. if it's like this why.??

March 17, 2022 13:37

@jpontang - that output looks fine to me. If you're also experiencing email troubles could you please open a new thread as this one is a year old?

atlantis21

July 14, 2022 08:19

I have same problem. But when I trype command telnet mx1.cpanel.net 25 I get this: [root@sn1 ~]# telnet mx1.cpanel.net 25 Trying 208.74.121.68... And nothing happen. I don't get results..?

July 14, 2022 12:28

@atlantis21 - just to be sure, what if you try another machine, like one of Google's servers:
telnet gmail-smtp-in.l.google.com 25
If that also doesn't respond, that would indicate the port is blocked.

July 14, 2022 12:45

OK thanks, But it work's now. Not sure what helped, but I think adding port 26 solved my problem

July 14, 2022 14:50

Adding port 26 would allow users with mail clients like Outlook and Thunderbird to connect to your server, but it wouldn't change anything with mail handling on the system. It could be there was just a temporary problem on the machine, but I'm glad to hear things are working well now!

MohammedSaeed

August 02, 2022 18:24

i have the same issue when i run this code telnet mx1.cpanel.net 25 it gives this message Trying 208.74.121.68... telnet: connect to address 208.74.121.68: Connection timed out and also i run this code telnet gmail-smtp-in.l.google.com 25 it gives this code Trying 74.125.140.26... telnet: connect to address 74.125.140.26: Connection timed out Trying 2a00:1450:400c:c08::1b... telnet: connect to address 2a00:1450:400c:c08::1b: Network is unreachable

August 02, 2022 19:52

@MohammedSaeed - that would most likely indicate that port 25 is blocked on your network, which is common with many hosting providers. You'll want to speak with your host and confirm if that is the case.

August 04, 2022 09:40

i talked with my hosting providers and they said this port is open and also i checked on this website Open Port Check Tool - Test Port Forwarding on Your Router and it looks like port 25 is open

August 04, 2022 13:36

That test would test an inbound connection, but not an outbound. Did the provider confirm the port was open in both directions? The comman line test you performed would indicate the port itself is closed.

Email Connection Timing Out

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