I get an email regularly from RootsMagic Community notifications@rootsmagic.discoursemail.com about popular topics. Every time, the link does not work - it is missing the . (period) between rootsmagic and com.
I used to get a Summary email until last summer and still get emails for each post in a thread I participate in and have not had a problem with the links in either.
Webmaster checked and the correct period is there. When I check my email links they correctly have the period in the URL. Not sure what could be causing your link to drop the needed period.