14 May
2013
14 May
'13
5:10 p.m.
Quoting Andrew McGlashan (andrew.mcglashan@affinityvision.com.au):
Already, the RFC takes away capitalization from emails, unless I am mistaken, but periods should be accepted as one of any of the available "normal" characters for the local part of the email address.
I can't find the RFC reference, but left-hand-side (local part) portions of e-mail addresses should be left intact and not lowercased, as there have been Internet-connected systems for which the local part is case-sensitive.