Re: [exim] host use tsl on port 25?

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Author: W B Hacker
Date:  
To: exim users
Subject: Re: [exim] host use tsl on port 25?
Zbigniew Szalbot wrote:
> Hello,
>
> I notice that quite a few hosts today try to start TSL session with my
> server while I am trying to deliver mail to them (remote delivery not
> smarthost service).


Sounds like they are simply attempting some form of sender verification before
allowing your inbound message to pass.

You can expect many/most servers to use TLS since you advertise it.

HTH,

Bill

>
> Here's a snippet from the session (the real size of the message to be sent
> is 5KB, don't know where 10905190 is taken from):
>
>   SMTP>> EHLO lists.lc-words.com
> waiting for data on socket
> read response data: size=75
>   SMTP<< 250-ESMTP Server Ready
>          250-SIZE 10905190
>          250-DSN
>          250-STARTTLS
>          250 TLS
> 157.150.184.102 in hosts_avoid_tls? no (option unset)
>   SMTP>> STARTTLS
> waiting for data on socket
> read response data: size=37
>   SMTP<< 220 Server ready Ready to start TLS
> Initialized TLS
> Calling SSL_connect
> SSL info: before/connect initialization
> SSL info: before/connect initialization
> SSL info: SSLv2/v3 write client hello A
> selecting on subprocess pipes
> selecting on subprocess pipes

>
> The hosts I am having problem with are verzion.net and bellsouth.net.
> Anyone else seeing this? I have not experienced such behaviour before.
> Exim 4.66 my end. Thanks!
>
> Warm regards,