we have put the server outside the firewall for other reasons, so not the firewall

I'm guessing the emails are stuck in the sending server as they have not received any bounces as of yet.

The sender has been in contact with their MX admin and they say they have no errors :-( - it's never the sender :-P

your help is very much appreciated

On Jan 19, 2016, at 8:41 PM, surgemail-support <surgemailHIDDEN@t@netwinsite.com> wrote:

> This error means the sending server sent.
> 
> ....(something) followed by:
> ==\r\n
> 
> And surgemail then waited for 4 minutes for something else to arrive, but nothing ever did. The message should terminate with:
> 
> \r\n.\r\n
> 
> So, (on the face of it) the sending server is faulty, or the network link is faulty, or some gateway/firewall inbetween is faulty, or the message in the senders que/file system is corrupt.
> 
>    ChrisP.
> 
> 
> On 20/01/2016 5:33 a.m., surgemailHIDDEN@etwinsite.com wrote:
>> At the end of a rejected message log entry is this.
>> 
>>  tcp_read_dot 251 250 seconds, got 1476 bytes (Err Code Zero LastBytes (/3d/3d/0d/0a))"
>> 
>> and the sender can't send anything to our server.
>> 
>> Ideas?
>> 
> 
>