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554 5.7.1 Reverse DNS mismatch limit

MDaemon 21.5.1

There is one host, Optonline.net that is rejecting e-mail with the error: 554 5.7.1 Reverse DNS mismatch limit. I have run all the e-mail host related tests at mxtoolbox and all tests pass, including Reverse DNS. Anyone ever see this problem before? Does anyone know if Optonline has Postmaster Services. I have searched and can not find any information for them.

Thanks,
mux

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Arron Caruth - Jul 5, 2022 6:51 am (#1 Total: 3)  

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What is your domain name?
 
Can you post a log snippet that shows the error occurring?
 

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Arron Caruth
Vice President of Product Development
o: 817-601-3222    e: Arron.Caruth@mdaemon.com

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On Mon, 4 Jul 2022 18:45:28 -0500, "lists-md-support@mdaemon.com (Jay Ashley)" <lists-md-support@mdaemon.com> wrote:
MDaemon 21.5.1

There is one host, Optonline.net that is rejecting e-mail with the error: 554 5.7.1 Reverse DNS mismatch limit. I have run all the e-mail host related tests at mxtoolbox and all tests pass, including Reverse DNS. Anyone ever see this problem before? Does anyone know if Optonline has Postmaster Services. I have searched and can not find any information for them.

Thanks,
mux


View/reply at 554 5.7.1 Reverse DNS mismatch limit
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Jay Ashley - Jul 5, 2022 1:09 pm (#2 Total: 3)  

 

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Jay Ashley
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Newbie
Posts: 23
Hi Aaron,

This is from the rejection e-mail. Note, it has now changed to, too many bad HELO.
Thanks.

--> EHLO deadacated.com
  <-- 554 5.7.1 Resources restricted - too many bad HELO

Arron Caruth - Jul 5, 2022 1:23 pm (#3 Total: 3)  

Guest User  

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Posts: 1
I haven't found anything so far.
 
Please post the entire outbound SMTP log snippet that shows the issue occurring, preferably the first issue.  
 
--
Arron Caruth
Vice President of Product Development
o: 817-601-3222    e: Arron.Caruth@mdaemon.com

MDaemon Technologies
Simple Secure Email

Visit us on www.mdaemon.com | Facebook | LinkedIn | YouTube
Sent using the MDaemon Email Server
 
On Tue, 5 Jul 2022 13:09:06 -0500, "lists-md-support@mdaemon.com (Jay Ashley)" <lists-md-support@mdaemon.com> wrote:
Hi Aaron,

This is from the rejection e-mail. Note, it has now changed to, too many bad HELO.
Thanks.

--> EHLO deadacated.com
  <-- 554 5.7.1 Resources restricted - too many bad HELO


View/reply at 554 5.7.1 Reverse DNS mismatch limit
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This list is for questions and discussion about MDAEMON. To unsubscribe 
from this mailing list send an email to md-support-unsubscribe@mdaemon.com .
--POWERED BY MDAEMON!-----------------------------------------------------

--------------------------------------------------------------------------
These forums are provided by MDaemon Technologies for user-to-user 
support and discussion.  MDaemon staff members may participate in the 
forums periodically but please recognize that this is not the official
method of receiving technical support. To receive personal technical 
support please use the form here:
http://www.mdaemon.com/Support/RequestSupport/
--------------------------------------------------------------------------

--MD-SUPPORT--------------------------------------------------------------
This list is for questions and discussion about MDAEMON. To unsubscribe 
from this mailing list send an email to md-support-unsubscribe@mdaemon.com .
--POWERED BY MDAEMON!-----------------------------------------------------

--------------------------------------------------------------------------
These forums are provided by MDaemon Technologies for user-to-user 
support and discussion.  MDaemon staff members may participate in the 
forums periodically but please recognize that this is not the official
method of receiving technical support. To receive personal technical 
support please use the form here:
http://www.mdaemon.com/Support/RequestSupport/
--------------------------------------------------------------------------



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