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Socket error 10053 on specific email address

[Leverland, Gerrit]
Gerrit Leverlan…
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Gerrit Leverland - 09:22am, Apr 20 2022

Hi,

I,m experiencing socket 10053 errors only on a specific email address. The rest of the mail works fine. I did adjust the MTU size to 1472 and did some test to see if the ping then gets through (I wasn`t having troubles with other email addresses with MTU 1500).
But still this mail from my server to another server keeps having socket errors. I,m beginning to think that it,s not my server who`s creating problems, however how do I prove to my customer that this is the case.

Message of my server : ( Mail is only 19kb big)
Socket error 10053 Connection abort
Socket read error
SMTP session terminated (Bytes in/out: 4536/4266)

Mdaemon 21.5.2 on Windows server 2022 ( not supported, i know)

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Gerrit Leverland - Apr 20, 2022 3:43 pm (#5 Total: 7)  

 

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Gerrit Leverlan…
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Posts: 20
Thanks Arron.
""According to the log, the recipient is rejecting your message because it is classifying it as spam. ""

So it (the receiver,s mailserver) then kills the connection and throws a 10053 socket error ?

If so i,ll check with the receiver. I, well my provider is on a blacklist. UCEPROTECTL3 but the settins of my mailserver seem allright.

[Last Editor: Gerrit Leverland, Apr 20, 2022 3:48 pm. Total Edits: 2]

Arron Caruth - Apr 20, 2022 3:49 pm (#6 Total: 7)  

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I believe the receiving mail server is just dropping the connection after issuing the 550 error, which results in a winsock error being logged. 

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On Wed, 20 Apr 2022 15:43:52 -0500, "lists-md-support@mdaemon.com (Gerrit Leverland)" <lists-md-support@mdaemon.com> wrote:
""According to the log, the recipient is rejecting your message because it is classifying it as spam. ""

So it (the receiver,s mailserver) then kills the connection and throws a 10053 socket error ?

If so i,ll check with the receiver. I, well my provider is on a blacklist. UCEPROTECTL3 but the settins of my mailserver seem allright.


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Gerrit Leverland - Apr 20, 2022 3:56 pm (#7 Total: 7)  

 

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Gerrit Leverlan…
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""I believe the receiving mail server is just dropping the connection after issuing the 550 error, which results in a winsock error being logged. ""

Thanks for helping me with this issue.



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