Having done a few tests I have proved that this is due to the spam
filtering btinternet use on their outgoing mail servers. The headers
contain lines like X-RazorGate-Vade-Classification: a spam filtering
service by Mirapoint:
Only those sending via btinternet SMTP servers (which included myself)
were getting these headers.
Why the posts are failing this spam test is another matter but at least
I know it is nothing to do with groups.io as the [SUSPECT] gets added
before they even reach there.
Dave
On 28 Feb 2018 at 12:44, Dave Sergeant wrote:
A few of our members are getting messages through our groups with
[SUSPECT] added to them, eg:
[SUSPECT] Re: [cdxc] Dayton 2018
It is not clear whether this is being added by groups.io or their own
email provider - I suspect the latter.
Has anybody else seen this and can offer an explanation?
Dave Sergeant