Mail failing at gmx.com domain

1

i received this message (below) when sending a test message to some at gmx.com…i just setup mailinabox on digitalocean with gandi.net dns … all systems test pass 100% and i can send a test email to my gmail account. any ideas what is wrong?
…
The mail system

<[angelo.marotta@gmx.com](mailto:angelo.marotta@gmx.com)>: host mx01.gmx.net[212.227.17.4] refused to talk to
me: 554-gmx.net (mxgmx116) Nemesis ESMTP Service not available 554-No SMTP
service 554-IP address is black listed. 554 For explanation visit


Reporting-MTA: dns; box.danmarotta.com
X-Postfix-Queue-ID: 6A6587E004
X-Postfix-Sender: rfc822; [dan@danmarotta.com](mailto:dan@danmarotta.com)
Arrival-Date: Fri, 15 Jan 2021 07:38:15 -0800 (PST)

Final-Recipient: rfc822; [angelo.marotta@gmx.com](mailto:angelo.marotta@gmx.com)
Original-Recipient: rfc822;[angelo.marotta@gmx.com](mailto:angelo.marotta@gmx.com)
Action: delayed
Status: 4.0.0
Remote-MTA: dns; mx01.gmx.net
Diagnostic-Code: smtp; 554-gmx.net (mxgmx116) Nemesis ESMTP Service not
available 554-No SMTP service 554-IP address is black listed. 554 For
explanation visit
https://postmaster.gmx.net/en/error-messages?ip=142.93.80.222&c=bip
Will-Retry-Until: Sun, 17 Jan 2021 07:38:15 -0800 (PST)
2

https://barracudacentral.org/rbl/removal-request

3

When I check dnsbl web site for bl and spam it’s shows “ok” for all categories with this message

Spam Database Lookup Results for 142.93.80.222

rDNS/PTR record for 142.93.80.222 is “box.danmarotta.com”.

Some mail servers will not accept mail from IP addresses with no rDNS/PTR record or a generic PTR record.

4

The IP address was previously on the Barracuda list but is now not on it.

The rDNS statement is there no matter the result.

Try sending the mail again and see if you get the same response.

5

Hi,

I had the same issue (554 error code). I contacted their support and explained my situation and asked them to lift the ban.

What I did was to fill out the form on their blacklist page using the postmaster@mydomain.tld and gave as much useful information as possible.

They replied quickly and polite and informed me that they unbanned my IP.

Now, it works flawlessly with their email addresses…

Hope that helps!