Apple - Do iCloud email addresses ignore periods like Gmail?

No, this doesn't work for iCloud email addresses. Just tried it and the email failed to deliver — the email must be exactly correct.

You can create an email alias in iCloud to accept your dotted version.

Eg. If your iCloud address is [email protected], then [email protected] won't work, unless you add an email alias for it in your iCloud email account. See:

http://help.apple.com/icloud/#mm6b1a490a

For full instructions on how to create your email aliases.