[ACARS] Messages being treated as spam

[R J Ware]

Hi folks

I've just had three messages returned as 'rejected'

-----quote---------
Hi. This is the qmail-send program at yahoo.com.
I'm afraid I wasn't able to deliver your message to the following 
addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<acars at mailman.qth.net>:
xx.xxx.xxx.xxx failed after I sent the message.
Remote host said: 550 Error: 554 SPAM-ID: B0016 - Your message looks like 
spam. To find out why your email was rejected see http://mailman.qth.net/

----unquote----------
I'm not going to waste my time sending messages which may or may not get 
through.
First it was SORBS, now it's this.

Rgds
Dick

(monitoring but not posting)