This domain was modified at your registrar on April 1st:
Domain Name: VEEN-TEMARVELDE.NET
   Registrar: MELBOURNE IT, LTD. D/B/A INTERNET NAMES WORLDWIDE
   Sponsoring Registrar IANA ID: 13
   Whois Server: whois.melbourneit.com
   Referral URL: 
http://www.melbourneit.com
   Name Server: DNS21.NAME-SERVICES.COM
   Name Server: DNS22.NAME-SERVICES.COM
   Status: clientDeleteProhibited 
http://www.icann.org/epp#clientDeleteProhibited
   Status: clientTransferProhibited 
http://www.icann.org/epp#clientTransferProhibited
   Updated Date: 01-apr-2015
   Creation Date: 29-mar-2001
   Expiration Date: 29-mar-2016
It is not using zoneedit nameservers, and it's MX record is not pointing at zoneedit:
Marks-MacBook-Pro:tmp markjeftovic1$ host -t mx veen-temarvelde.net
veen-temarvelde.net is an alias for melbourneit.hotkeysparking.com.
melbourneit.hotkeysparking.com mail is handled by 10 p.nsm.ctmail.com.
It looks like your domain expired on March 29 and is now parked. Perhaps you forgot to renew it with your registrar?
I can see from the logs that prior to that we were delivering email to you just fine.