Temporary suspension is possible… subject to the accuracy of your Whois / domain record
It is possible that occasionally domains will be temporarily suspended over the coming months as all Registrars roll out ICANN rules.
The current ICANN Registrar Accreditation Agreement (RRA) requires registrars to verify that the email you use in your domain name is accurate. For details on ICANN requirements around registrant verification, please visit the ICANN website at www.icann.org. http://www.icann.org/en/resources/registrars/raa/approved-with-specs-27jun13-en.htm#whois-accuracy
The specific ICANN clause means that within fifteen days from registration the Registrar must;-
“Validate that all email addresses are in the proper format according to RFC 5322 (or its successors).”
The original RFC is here http://tools.ietf.org/search/rfc5322 but in a nutshell this simply says the email of record for the domain must work