[DXBase] Reflector Mail Problems - what gives?

[Art Searle]

I just posted a message to this reflector.  I know it went ok because I
looked at the archive and it is there.

Then I get 2 strange email responses directly to my email address that I do
not understand.

#1
>From Francis <francisc=asia.com@spamarrest.com> with the following content:
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Francis here,
I'm protecting myself from receiving junk mail.
Just this once, click the link below so I can receive your emails. You won't
have to do this again.
----------------------
I did not include the link or the balance of the message.  It was from
something called Spamarrest.

I did not click on the link and I will not be a party to this be it some
kind of hoax or an individual's effort to limit his own spam.

2)
Next from postmaster@lds.co.uk <postmaster@lds.co.uk> I get this:
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Your message has encountered delivery problems
Delivery failed 550: User unknown
No recipients were successfully delivered to.
----------------------
Why did I get this?  I only sent email to the reflector and I am only
subscribed to the Digest?

Art
W2RNA