Change Exim Smtp Port To 26

May 26, 2007

should i need to edit /etc/services and /etc/exim.conf?

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Email Server Port- How To Change/add Port For SMTP

Feb 19, 2008

Currently I am using Linux + cPAnel and using the port 25 for email sevrer. Currently we facing 1 problem is, some user's ISP is not support port. May I know how can I add additional port into server and allow users to send mail by different port?

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How To Change Smtp Relay Ip For Exim

Jan 14, 2007

to change ip for smtp relay. I need to use a separate ip to send all the emails from my server.

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Apr 26, 2008

I've recently purchased a cPanel VPS from a company i found on this forum. However, i am not experiencing some problems with the sending of e-mails from the server via Outlook Express. Unfortunately, i'm have no real knowledge of EXIM and i was hoping someone would help me with this. Basically, when i setup the domain and then setup a email account, i could only receive emails and not send (as i was getting an error within Outlook) this was due to the fact that the domain name was not listed in /etc/localdomains, so when i added it to that file it seemed to have done the job. Now, when i send emails locally EG: example1@domain to example2@domain i t will indeed send correctly, however if i want to send it to an external domain it stays in the queue (which i can view in WHM). When i force send it, it gives me the message "Connection refused", can anyone shed some light on this situation?

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Email SMTP Port

Jul 29, 2007

I just enabled SMTP on my box, and tried requesting a loss password on my website, i get this error.


Warning: mail() [function.mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set()

How do i get rid of this error.

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Exim Smtp-after-pop Authentication

Jun 8, 2007

I use Exim + Dovecot for my mail server. We can get mails through pop3 protocol without a problem, but when we try to send mails, exim does not permit relay. My passwords are stored in a mysql database for dovecot. Is it possible for exim to do authentication based on that? If it will be easier, i can create a text file with md5 passwords on it for my users.

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Exim Smtp Authentication

Mar 2, 2007

Where I have to configured Cpanel Exim Smtp Authentication for ASSP-Deluxe.

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CPanel, Email And Smtp Port 587

Aug 6, 2008

Is anyone successfully using cPanel with smtp port 587 and have a working email account?

After deciding that Plesk wasn't for me due to the lack of reference material in this and other forums, I had my hosting company, ServInt, delete my old vps and install a new one with cPanel.

Everything went fine until I configured my email. Just like with Plesk, I cannot access the smtp server via Outlook. I can ping it successfully, but it either terminates the connection or doesn't recognize the correct user name and password. With Plesk, it was a simple matter of enabling the use of port 587.

Not so with cPanel, at least for me. Even though the Exim service is enabled and another instance is enabled on port 587, I still can't connect. Thought it might be CFS, which is new to me with this install, so made sure it was disabled. Opened up a ticket with ServInt and even their techs can't get it functioning, so _they've_ opened up a ticket with cPanel.

Hence the title of this post, I can't beleive that I'm the only one whose had this problem before because blocking port 587 has been done by BellSouth/AT&T for many years now.

Nothing like having your company email down for over 6 hours to keep you up at night.

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SMTP Under Exim -- Sort Of Open

Jan 30, 2008

I really hope I'm just going batty with sleep deprivation, because this is making no sense to me. Before I clobber my poor provider with management requests, I want to see if this is typical behavior or not. I am able to send messages through my SMTP server from my laptop without using any authentication at all. It doesn't matter whether I'm using a client (tested and Mozilla Thunderbird) or whether I'm going in via telnet. A typical session might look like this (addresses obfuscated):

asdfasdfasdf:~ ###$ telnet 25
Trying ##.##.##.## ...
Connected to
Escape character is '^]'.
220 ESMTP Exim 4.67 Wed, 30 Jan 2008 00:56:03 -0800
250 Hello [##.##.##.##]
250 OK
250 Accepted
354 Enter message, ending with "." on a line by itself

This should not work
250 OK id=1JK8kZ-0004Xx-7O
221 closing connection
Connection closed by foreign host.
asdfasdfasdf:~ username$

I was expecting to see a "550 authentication required" message after it saw that "RCPT TO" wasn't a locally-hosted domain. I did confirm that the message was properly delivered to the intended Gmail address. So far, it looks like an open relay. But when
I use a third-party environment, such as the open relay checker at, I am correctly seeing "550" messages at the appropriate places.

In other words, when anyone else does it, they get "550". When it do it from my laptop (from any client or telnet session), I'm clear to send. Just to add a little zest to the situation, when I did this same test 36 hours ago, I *was* getting "550" errors.

This doesn't seem right to me. However, my mail admin skill level is approximately zero, so I'm willing to accept that this is normal behavior and that I am overlooking the obvious.

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Exim SMTP Sync Error

Jan 28, 2007

I recieve the error when ClientExec is trying to send email in my rejectlog...

2007-01-28 20:53:17 SMTP protocol synchronization error (input sent without waiting for greeting): rejected connection from H=[] input="EHLO

I added and to the whitelist files and added this ACL to exim.conf after begin acl:

accept hosts=

If it matters, I am running CentOS4 64-bit, DirectAdmin, Kernel 2.6.18

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Plesk 11.x / Linux :: Alternative SMTP Port

May 23, 2014

I would like to close port 25 and use other port for SMTP service and so avoid a lot of attempts to Access my SNTP port.

I followed all the steps in [URL] ... included the last one, about close port 25 from external.

And now qmail can send mails but can not receive from external senders. Is there any solution for solve it? or qmail must listen port 25?

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WHM Exim Does Not Refuse Emails During SMTP With :fail:

Feb 7, 2008

running WHM at Fedora 6... WHM 11.11.0 cPanel 11.16.0-R18546

I have a problem with spoofing spammers.. my queue is plenty of non-delivered emails from externals SMTP, sended to NON-existents address on my server...

The question is the destination domain ( b.example) has already its ":fail: No Such User Here" alias.

SMF records applied, but not the most external SMTP servers checks them nowadays...

Using :fail: the email is never accepted into the server. During the initial SMTP negotiation when the senders SMTP server connects to your SMTP server, the sending SMTP server issues a RCPT command notifying your server which email address the email to follow is intended for. Your server then checks whether the recipient email actually exists on your server (a POP3 account, an alias or a catchall alias) and if it does not, it issues an SMTP DENY which terminates the attempt to deliver the email.

Well, in my case it justs receives message and then frozen it!

Some more data:


mailnull 47 12
1202321302 0
-interface_address 85.x.x.x.25
-received_protocol smtp
-body_linecount 50
-max_received_linelength 93
-frozen 1202407547

210P Received: from [] (port=1839
by with smtp (Exim 4.68)
id 1JMoh4-0004UG-Pz
for; Wed, 06 Feb 2008 19:08:23 +0100
069P Received: (qmail 6913 invoked for bounce); 5 Feb 2008 09:04:11 -0500
032 Date: 5 Feb 2008 09:04:11 -0500
032F From:
039T To:
024 Subject: failure notice


Message 1JMoh4-0004UG-Pz is no longer frozen
cwd=/usr/local/cpanel/whostmgr/docroot 4 args: /usr/sbin/exim -v -M 1JMoh4-0004UG-Pz
delivering 1JMoh4-0004UG-Pz
** F=<> R=virtual_aliases: No Such User Here
Frozen (delivery error message)

AT LOGS (first time):

2008-02-06 19:08:17 SMTP connection from []:1839 I=[]:25 (TCP/IP connection count = 9)
2008-02-06 19:08:20 no host name found for IP address
2008-02-06 19:08:22 H=( []:1839 I=[85.x.x.x]:25 Warning: Sender rate 0.0 / 1h
2008-02-06 19:08:23 1JMoh4-0004UG-Pz <= <> H=( []:1839 I=[85.x.x.x]:25 P=smtp S=2405 T="failure notice" from <> for
2008-02-06 19:08:23 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1JMoh4-0004UG-Pz
2008-02-06 19:08:23 1JMoh4-0004UG-Pz ** F=<> R=virtual_aliases: No Such User Here
2008-02-06 19:08:23 1JMoh4-0004UG-Pz Frozen (delivery error message)
2008-02-06 19:08:24 SMTP connection from ( []:1839 I=[85.x.x.x]:25 closed by QUIT

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Sending Mails Without SMTP Authentication On Exim

Oct 17, 2007

I have a customer that wants to send emails using Exim and SMTP (using outlook), withouth authentication. Now.. the big question is ... how can I configure the Exim server to work withouth any authentication?

I know the risks of this withouth any authentication, but is my customer's server and he want to work in this way.

He is also asking if he is able to send emails withouth authentication using SMTP for certain IP addresses.. is that possible? Can be done for only 1 domain, or for the entire server?

Im using Exim 4.6.8 and RHE 4 + cPanel.

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Plesk 11.x / Linux :: How To Add Additional SMTP Port To Qmail

May 13, 2014

I want to add a new port for SMTP (1024) as a client's ISP block 25, 587 and 2525. I tried following this guide: [URL] ... but it doesn't work with Parallels Plesk Panel 11.5 ...

How to add an additional SMTP port to Qmail in Plesk 11.5?

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How To Configure A Firewall To Let Only Exim Connect Via Port 25

Feb 20, 2008

Alright now this is the most intelligent way to send spam I have ever seen. Apparently a guy has made a PHP or Perl script that is acting as an MTA. That's right: He is neither using Sendmail nor Exim but he made a script that acts as an MTA. That means the script itself connects to third party mailservers via port 25 and communicates with the remote mailserver as if it was an MTA itself. This works even if Exim is entirely disbaled...

The spam still get's sent. The script is running only occasionally...not like a daemon.

So it is nearly impossible to locate it. You have no Exim logs to look at. And in the Apache logs any PHP script could be it... You are not able to find that out. Therefore I am unable to stop him unless I manage to block outgoing connections to another host's port 25 for any program but for exim.

How can I configure my firewall (APF) so that only Exim my connect to other servers via port 25? Is that even possible?

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How Change Ssh Port

Apr 17, 2009

i want to changing my ssh port from 22 to other .

so i have edit ssh_config and change 22 to for example 9000 .

and add 9000 in TCP_IN and TCP_OUT on my csf Config and delete 22 from them
and restart ssh .

but my ssh isnt login with 9000 and no effect .

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Change SSH Port

Sep 24, 2007

I decided to change my SSH port. I red an Article about it.


At command prompt type: pico /etc/ssh/sshd_config
Scroll down to the section of the file that looks like this:
#Port 22
#Protocol 2, 1
#ListenAddress ::

Uncomment and change
#Port 22
to look like
Port 5678 (choose your own 4 to 5 digit port number (49151 is the highest port number)
Uncomment and change

#Protocol 2, 1
to look like
Protocol 2
Save file and restart SSH

And I do all step. I change Port 22 to port 8443 . But Now I cannot loging to root via port 8443 . WHy?

How can I change this port to 22.

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Change Port

May 14, 2007

i have a few windows xp running IIS in a LAN.

i have a static IP from my current ISP.

is there any way that i can have all these 7 machine to work with individual domain names


server 1 =
server 2 =

any way to have this work?

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Qmail Or Sendmail Or Postfix With WHM Other Than Exim Mail SMTP

Apr 21, 2008

Can i use Qmail or Sendmail or Postfix with WHM other than exim mail SMTP.

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Change FTP Port On APF Firewall

Jul 3, 2008

Is it possible to change the port of ftp, similarly to what you can do with SSH?

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Any 'easy' Smtp / Pop / Imap Package Or Installer W/o Having To Read Up On Exim Etc.?

Oct 31, 2008

any 'easy' smtp / pop / imap package or installer w/o having to read up on exim etc.?

I want an email server quickly, w/o having to become an expert...

I'd go w/ a hosted service, but I open allot of pop3 connections... (program I use downloads one email, closes connection, reopens... repeat)...

There's lots of cookbooks out there, but they require quite a bit more time commitment (and configurability) than I want / need.

Is there any dumbified installs available? I tried with webmin, but even that wants me to manually configure a postfix / imap server bridge.=

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Plesk 11.x / Linux :: SMTP Service (qmail) Stops Responding On Port 25

May 19, 2015

Since 15.05.2015 smtp experiencing problems.

Smtp service (qmail) stops responding on port 25:
# time telnet localhost 25
Connected to localhost.localdomain (
Escape character is '^]'.
Connection closed by foreign host.

real 4m10.629s
user 0m0.000s
sys 0m0.002s

After server restart or sometimes apache stop or ixnetd restart its responding for a some random time, and then again it stops to respond. Plesk panel show it as stopped but qmail itself running in memory, and does other its work, it just stops responding at port 25, or responds with a huge delay.

I've tried change it to postfix, reconfigured with mchk, repaired with -r, disabled and uninstalled parallels antivirus, antispam, dnsbl, disabled firewall, disabled smtp lock. Checked apache, dns. Enabled submission port which works when 25 port doesnt, but i need working 25 port.

Nothing solves problem, its just stops responding after some random time. There is no errors on maillog.

I think this problem occured after recent plesk microupdate, because i didn't do anything to server configuration in last months.

This article says it might be dnsbl [URL] .... but it disabled(from plesk panel) on my server, maybe there is way to focefully kill any relation to dnsbl?

Plesk info:
OS Red Hat Enterprise Linux Server 5.9 (Tikanga)
Panel version 11.5.30 Update #50, last updated at May 18, 2015 05:21 PM
The system is up-to-date; last checked at May 17, 2015 10:56 PM

update: xinetd restart is definitely brings smtp alive, but it goes off after random period of time (5min ~ couple hours)

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Plesk Automation :: After PPA Migration - Outgoing SMTP Submission Port Error

Aug 29, 2013

After migrating our existing client base from legacy Plesk 9.x servers and Expand to PPA, clients phoned in with mail sending problems. These clients are using submission port 587 because their ISPs intercept port 25.

Existing client, Outlook error message:

"None of the authentication methods supported by this client are supported by your server"

Testing with Thunderbird, error message:

"An error occurred while sending mail. The mail server responded: 5.7.0 Must issue a STARTTLS command first. Please verify that your email address is correct in your Mail preferences and try again."

It seems a "fresh" PPA requires STARTTLS on e-mail clients. It is furthermore confirmed that Thunderbird detects the e-mail server settings as dependant on TLS.

The problem is that TLS doesn't seem to work properly by default.

In order to preserve our existing customer base, we follow: [URL] ....

Bottom line, in your /etc/postfix/, change the line that says "submission" from this:

submission inet n – - – - smtpd -o smtpd_enforce_tls=yes -o smtpd_tls_security_level=encyrpt -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticate d,reject -o smtpd_sender_restrictions= -o smtpd_proxy_filter=127.$

to this:
submission inet n – - – - smtpd -o smtpd_enforce_tls=no -o smtpd_tls_security_level=may -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticate d,reject -o smtpd_sender_restrictions= -o smtpd_proxy_filter=127.$

then do:
/etc/init.d/postfix reload

This is just a quick fix to get you going and stop the phones from ringing. Ideally we would like to re-enable TLS and have information as to why it is not working.

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How To Change My Mail SMTP Relay Ip ?

Jul 23, 2008

I m using cpanel and exim 4 and my server ip is black list. Now i want to change my server ip address.

How can i do this?

I have edited exim.conf

driver = smtp
interface =

But it is not working please guide me any other way.

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Change Path Of Exim Log

Dec 12, 2008

How do I change the path of the Exim log directory? I am using Cpanel/WHM.

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