Outlook unable to connect

Operating System & Version
CentOS v7.9.2009
cPanel & WHM Version
v100.0.7

amadino13

Member
Jan 22, 2022
9
0
1
Toronto
cPanel Access Level
DataCenter Provider
I am able to send and receive emails from CPanel via webmail without any issues. However when I try to add the account into Outlook, it's saying "unable to sign in, check credentials and try again." The login info is correct. I have also checked the ports on the server, they are all open "Open Port Check Tool - Test Port Forwarding on Your Router" 25/465/587/993. Any ideas?

The same issue presents on iOS when trying to add an account using IMAP.


Code:
cpanel_php_fpm        up  
cpanellogd        up  
cpdavd        up  
cphulkd        up  
cpsrvd        up  
crond        up  
dnsadmin        up  
exim    4.94.2-4.cp1198    up  
httpd    2.4    up  
imap    2.3    up  
ipaliases        up  
lmtp        up  
mailman    2.1.37-1.cp1198    up  
mysql    8.0    up  
nginx        up  
nscd    2.17-325    up  
pop    2.3    up  
powerdns    4.4.1-2.cp11100    up  
queueprocd        up  
rsyslogd    8.24.0-57    up  
spamd    3.4    up  
sshd    7.4p1-22    up  
System Information
System Item    Details    Status
Server Load    0.032715 (16 CPUs)  
Memory Used    44.06% (3,356,788 of 7,617,840)  
Swap Used    0% (264 of 7,864,316)
 

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Last edited by a moderator:

cPRex

Jurassic Moderator
Staff member
Oct 19, 2014
9,796
1,529
313
cPanel Access Level
Root Administrator
Hey there! I do see that port 25 is responding how I would expect at this time, assuming the IP address listed in your screenshot is the public IP of the server in question.

It's good that you tried multiple devices as that does indicate it is a server or network issue.

The next thing I would check would be the logs in /var/log/messages and /var/log/exim_mainlog to see if there are any authentication failures listed there, or issues with the mailserver that may show up.
 

cPRex

Jurassic Moderator
Staff member
Oct 19, 2014
9,796
1,529
313
cPanel Access Level
Root Administrator
Those logs are way too large for me to get any useful data from. The best way to get data would be to do the following:

-Run this command on the server:

Code:
tail -f /var/log/messages
OR
Code:
tail -f /var/log/exim_mainlog
OR
Code:
tail -f /var/log/maillog
You can do a separate test for each file, or open multiple terminal windows to see all at once. Those commands will show you the content of each log as it updates in real-time.

-Try and connect with Outlook and see what the specific entry is in each log.
 

amadino13

Member
Jan 22, 2022
9
0
1
Toronto
cPanel Access Level
DataCenter Provider
I have been playing around with invoicing and it seems that Yahoo is rejecting my emails, any ideas why?


Code:
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  [email protected]
    host mta5.am0.yahoodns.net [98.136.96.91]
    SMTP error from remote mail server after end of data:
    554 5.7.9 Message not accepted for policy reasons. See https://postmaster.yahooinc.com/error-codes
Reporting-MTA: dns; nameless.blkhost.com

Action: failed
Final-Recipient: rfc822;[email protected]
Status: 5.0.0
Remote-MTA: dns; mta5.am0.yahoodns.net
Diagnostic-Code: smtp; 554 5.7.9 Message not accepted for policy reasons. See https://postmaster.yahooinc.com/error-codes
Return-path: <[email protected]>
Received: from blkhost by nameless.blkhost.com with local (Exim 4.94.2)
    (envelope-from <[email protected]>)
    id 1nEc3M-0003iz-Pe
    for [email protected]; Mon, 31 Jan 2022 14:09:29 -0500
To: Cesar Ghiroltean <[email protected]>
Subject: Customer Invoice
X-PHP-Script: blkhost.com/panel/admin/quotes.php for 69.156.126.155, 69.156.126.155, 10.69.3.173
X-PHP-Originating-Script: 1001:PHPMailer.php
Date: Mon, 31 Jan 2022 19:09:28 +0000
From: BLK Host <[email protected]>
Reply-To: BLK Host <[email protected]>
Message-ID: <[email protected]>
X-Mailer: BLK Host
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="b1_9S5qEkk4mYWPhxtysumi8VJZuz9ksYgbGTdlsq1BakE"
Content-Transfer-Encoding: 8bit
X-Exim-DSN-Information: Due to administrative limits only headers are returned
 

cPRex

Jurassic Moderator
Staff member
Oct 19, 2014
9,796
1,529
313
cPanel Access Level
Root Administrator
That's the standard Yahoo bounceback message. Your IP address is on Yahoo's blacklist so they won't process your mail.

If you check Email Blacklist Check - IP Blacklist Check - See if your server is blacklisted you'll see your server's IP is also listed there in one of the major blacklists, so that is also something that will need to be addressed.

I'd start with the Sorbs list mentioned in MXToolbox, and then see if you continue to have issues with Yahoo separately - while they do maintain their own blacklists, they definitely base it off some of the public lists as well.
 

raysk8ap

Registered
Feb 7, 2022
1
0
1
Perú
cPanel Access Level
Website Owner
Greetings, I also have the same problem. I've tried to use my account through Outlook, I've used the mail client configuration provided by CPanel for my account, but at the moment of logging in it shows the message "Login to incoming mail server (IMAP): Cannot find host mail.regiona*******.g**.p*'. Check if you have typed the server name correctly."
Something needs to be configured by the domain administrator or what am I doing wrong.
 

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