Error code 421 - not receiving emails from ONE email address - not blocked by me - HELP!

[LLLLLJAMMMMM]

For some reason, since 18/12/23, I can no longer receive emails from one particular email address.  I have checked that it is not blocked (by me)

Below is the extract that the sender received back.

1/11/2024 2:48:52 PM - Server at DB9PR05MB8475.eurprd05.prod.outlook.com returned '550 5.4.300 Message expired -> 421 4.4.2 Connection dropped due to SocketError'
1/11/2024 2:29:49 PM - Server at mx-eu.mail.am0.yahoodns.net (188.125.72.74) returned '421 4.4.2 Connection dropped due to SocketError'

I can receive emails (from said address) into another email account - so I know the emails can come in.

I CANNOT work out what I need to do? or whether this will resolve itself?

From my reading around, it looks like Yahoo have decided the sender is a spam account (it isn't) - so how do we get this resolved? NB I am not IT savvy and struggle with some of the terminology - so any help, taht a layman can understand and implement, would be extremely helpful!!!

[jayach]

Would that happen to be a hotmail address, there have been previous reports of hotmail addresses being rejected?

[LLLLLJAMMMMM]

Hi Jayach

Not a hotmail account.  It is a .net email address .  They are not having any other email kick backs mine. I am clueless as to how to resolve.  Any help is much appreciated!  

[jayach]

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@LLLLLJAMMMMM wrote:

I am clueless as to how to resolve.  

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Me too I'm afraid, and Google wasn't much help.

421 4.4.2 Connection dropped due to SocketError - Google Search

[caesarome]

@LLLLLJAMMMMM 

What email program are you using to access your emails ?

[LLLLLJAMMMMM]

My emails are accessed via Apple Mail BUT I have also logged directly into my Web Yahoo account (I usually always keep it accessed, just to check if something falls between)- they are the same (ie both missing these emails from a particular .net sender).   So (I think!)  the issue is either:

1) Yahoo has blocked the sender

2) the sender has done something which is preventing them from sending to me (the sender is as confused as I am - neither of us have done anything.

I cannot speak to anyone at Yahoo - there seems no way of contacting them.  Or should I and/or sender be contacting microsoft support?  I am completely confused by the jargon and technology...why is it so difficult to resolve??

[R.J.Howbrook]

did this ever get resolved, same issue here

[NickParks]

Same issue here too, several instances of people mailing to my sky email address, only to get a bounceback a couple of days later - 

"- Server at mx-eu.mail.am0.yahoodns.net (188.125.72.74) returned '421 4.4.2 Connection dropped due to SocketError'"

[VJ55]

I am also seen several instances of people mailing to my sky email address, only to get a bounceback a couple of days later. I can't find anywhere that explains how to resolve this issue or how to contact someone on sky yahoo account admin to help resolve.

Has anyone had any luck resolving this issue? 

[LLLLLJAMMMMM]

My issue did resolve BUT it was the senders issue - I still don't fully undertand what happened but it seems that Yahoo is extremely sensitive to perceived spam - if it thinks someone is sending spam or bulk messages - then it blocks them from coming in.  As you can tell, I am not technically minded - I suggest you contact the initial sender and get them to enquire from their side.

NB I had absolutely no luck in finding someone from sky or yahoo to talk to about this..... very frustrating!

[stevetg]

Same issue here.  I can no longer send from a live.co.uk (which is Microsoft) to a Sky Yahoo email address.  I find it hard to believe that Microsoft have changed anything at their end, more inclined to believe Yahoo have changed something at their receiving end which is blocking Microsoft emails...    I have found no resolution yet. 

[Ofc23]

+1

having the same issue. My partner (live.co.uk) is no longer able to email me....