Email bouncing??

I just rec'd a fone call from a customer in California who told me he had
tried to email me from my website at and the email
bounced. My email address on the website is snipped-for-privacy@customcutgrafix.com . I
just sent myself a test email and it came thru OK... THis address has
always worked just fine, and this was possibly a just a server glitch.
If anyone on this NG tries to email me for graphics or whatever and cannot
get thru, please use my alternate email address, snipped-for-privacy@cox.net ...
Thanx,
Bill