One of the nice little details of email address syntax is that ' is not a special character, so niall.o'reilly@example.ie is just fine. One of the vexing thing

One of the nice little details of email address syntax is that ' is not a special character, so niall.o'reilly@example.ie is just fine. One of the vexing things about MS Outlook and Exchange is that they insist on using a non-standard syntax in which ' is used as a quote, so they make an appalling mess of mail headers.