Message Delivery Failure - Mail Delivery System

psytanium

Well-Known Member
Jun 6, 2014
319
19
68
Lebanon
cPanel Access Level
Root Administrator
Hello,

1 of the users on my server is failing to deliver emails, all emails sent to 6 different email address are returned with this msg "550 permanent failure for one or more recipients".

First I suggested to contact one of the recipients mail administrator, but the 6 email addresses are not on the same domain name, they are 6 different companies. There must be something wrong from our side.

We tried to use another computer and another ISP without success.

and not all return messages are the same, here are some e.g.

Code:
Final-recipient: rfc822; [email protected]*******.de
Diagnostic-Code: smtp; 550 permanent failure for one or more recipients ([email protected]******.de:quarantined)
Code:
Final-recipient: rfc822; [email protected]*******.it
Diagnostic-Code: smtp; 550 5.7.0 Message rejected per SPF policy
Code:
Final-recipient: rfc822; *******@gmail.com
Diagnostic-Code: smtp; 550-5.1.1 The email account that you tried to reach does not exist. Please try
Code:
Final-recipient: rfc822; [email protected]*******8.com
MXtools returned no errors from my server neither from their servers.

Thank you for some hints
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,884
2,243
463

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,884
2,243
463
Hello,

Can you verify if messages are still failing? Also, can you verify those remote email addresses accept email from other servers? For instance, with this bounce:

Final-recipient: rfc822; *******@gmail.com
Diagnostic-Code: smtp; 550-5.1.1 The email account that you tried to reach does not exist. Please try
Have you tried sending to that Gmail address from another server (e.g. Hotmail, Yahoo) to verify that Gmail email address actually exists?

Thank you.
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,884
2,243
463
New I tried and got the same result. the email address does not exist. What can we do about [email protected]*******.de ??
Final-recipient: rfc822; [email protected]*******.de Diagnostic-Code: smtp; 550 permanent failure for one or more recipients ([email protected]******.de:quarantined)
This is a failure message coming from the remote mail server. You'd need to reach out to the email administrator or support team of that remote mail server to see why they are blocking emails from your server if you can confirm new attempts to send emails to that remote address fail, and attempts to send emails to that email address from other mail servers succeed.

Thank you.
 

psytanium

Well-Known Member
Jun 6, 2014
319
19
68
Lebanon
cPanel Access Level
Root Administrator
What pushed me to open this thread is the rejections coming from different email addresses.

Now I tried to send a mail to [email protected]*******.de from another domain hosted on the same server (my server). I received the same rejection message.

Final-recipient: rfc822; [email protected]*******.de Diagnostic-Code: smtp; 550 permanent failure for one or more recipients ([email protected]******.de:quarantined)

I asked 1 recipient to contact her email administrator. Meanwhile let me know if something can be done from my side.

Thanks
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,884
2,243
463
I asked 1 recipient to contact her email administrator. Meanwhile let me know if something can be done from my side.
You could try sending to that recipient from a remote mail server (e.g. Yahoo, Gmail) to verify if the rejection is isolated to your specific server.

Thank you.
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,884
2,243
463
New sending from my Gmail address to [email protected]*******.de is working, email received.
You'd need to wait until you hear back from the email administrator of the remote server to determine why messages from your server are rejected.

Thank you.
 

psytanium

Well-Known Member
Jun 6, 2014
319
19
68
Lebanon
cPanel Access Level
Root Administrator
The problem is getting bigger, more servers rejecting emails coming out from my server. I did some experiments:
  • Sending emails from any domain name hosted on my server is rejected.
  • Sending from Webmail roundcube instead of MS Outlook is rejected.
  • Sending emails from a domain name with dedicated IP hosted on my server is rejected.
  • Sending emails from another server (Godaddy shared) is sent and received successfully.
in the starting post, it happened that we have wrong address of 1 of the recipients, but many others are not receiving our emails while they receive from other servers.

I started receiving notifications from some users 4 weeks ago, but now things are getting serious, I need some documentations or some assistance.

Thanks
 

psytanium

Well-Known Member
Jun 6, 2014
319
19
68
Lebanon
cPanel Access Level
Root Administrator
I attached screenshot of Mail Tweak Settings and Exim Configuration. Thanks for having a look.

imgur.com/jckMEd5
/imgur.com/Hp289DB
 
Last edited by a moderator:

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,884
2,243
463
Hello,

Feel free to open a support ticket using the link in my signature if you'd like us to take a closer look at your server to verify there are no configuration settings leading to the blocks.

Thank you.
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,884
2,243
463
Ticket submitted 8679445
To update, it looks like the issue was addressed after setting up the SPF record like this:

Code:
v=spf1 +a +mx include:spf.secureserver.net ~all
Thank you.