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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
Jay Ashley
- Jul 5, 2022 1:09 pm
(#2 Total: 3)
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Jay Ashley
 Newbie Posts: 23
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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
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Arron Caruth
- Jul 5, 2022 1:23 pm
(#3 Total: 3)
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Posts:
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I haven't found anything so far.
Please post the entire outbound SMTP log snippet that shows the issue occurring, preferably the first issue.
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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