Re: [exim] Windows based Mail servers and exim

[Julian Bradfield via Exim-users]

On 2023-02-07, The Doctor via Exim-users  wrote:
> Wonder if anyone has notice a problem with
> Windows based server like Exchange or spamrtmail
> sending to exim servers

What makes you think the problem is with the server software?

> No connection could be made because the target computer actively refused it. 
> This usually results from trying to connect to a service that is inactive on 
> the remote host - that is, one with no server application running. For more 
> information and tips to fix this issue see this article: 
> https://go.microsoft.com/fwlink/?LinkId=389361

If it were my server you were trying to connect to, this would mostly
likely mean that you had been trying to crack my server and had been
blocked. Perhaps your client is also running malicious software?

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Re: [exim] Windows based Mail servers and exim

[Odhiambo Washington via Exim-users]

I have two sites running hMailserver and they interact very well with all
the servers running Exim, which I also manage. You introductory paragraph
is just mote it not supported by evidence.
Maybe the question belongs to the forums for those applications. Exim has
no problem and acts the way it is instructed to.

On Tue, Feb 7, 2023, 19:44 The Doctor via Exim-users 
wrote:

> Wonder if anyone has notice a problem with
> Windows based server like Exchange or spamrtmail
> sending to exim servers
>
> Got this from a client
>
> Your message wasn't delivered. Despite repeated attempts to deliver your
> message, the recipient's email system refused to accept a connection from
> your email system.
>
> Contact the recipient by some other means (by phone, for example) and ask
> them to tell their email admin that it appears that their email system is
> refusing connections from your email server. Give them the error details
> shown below. It's likely that the recipient's email admin is the only one
> who can fix this problem.
>
> For Email Admins
> No connection could be made because the target computer actively refused
> it. This usually results from trying to connect to a service that is
> inactive on the remote host - that is, one with no server application
> running. For more information and tips to fix this issue see this article:
> https://go.microsoft.com/fwlink/?LinkId=389361
>
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Re: [exim] Windows based Mail servers and exim

[Jeremy Harris via Exim-users]

On 07/02/2023 15:19, The Doctor via Exim-users wrote:

For Email Admins
No connection could be made because the target computer actively refused it.


That bit there is the important info.  Unfortunately, they didn't say
what IP they tried to connect from, and unless you can infer anything
else about them (such as IPs used by previous messages from them that
you did accept), you need it to search for in your logs.  You might
have to contact the operator of tha system and ask.

Then: search your Exim mainlog for connections from that IP.  If there
is one that matches the expected date/time, what was logged about it?

If none such: do you run a firewall?  What about its logs?
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Cheers,
  Jeremy


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