June 14, 2015
I have an openSUSE email alias. When I write down the email address, most of the time, I put the “suse” part capitalized to preserve the correct lettering of openSUSE. Domain names are case insensitive. Therefore if you type opensuse.org or openSUSE.org in your browser, they would both be accepted. When people reply my emails they would notice the address bar writes @openSUSE.org which contains the capitalized part.
When I receive the email though, it is turned to @opensuse.org. I was thus murmuring ‘damn, case insensitive’ when I was reading my emails a few days ago at meeting. The gentleman next to me murmured back, ‘no, emails are case sensitive’. I argued no, even if you write the address capitalized the email server interprets and replies back with a full non-capitalized address.
The gentleman was S. Moonesamy. He slapped RFC 5321 at my face & that was like ‘do your homework’.