Added UT Dallas mail settings (#244)

pretty easy to find on their website, yet a short timesaver for students who bump into this in the future

share/domains.csv

@@ -216,4 +216,4 @@ yandex.ua,imap.yandex.com,993,smtp.yandex.com,587
 zoho.com,imap.zoho.com,993,smtp.zoho.com,465
 clarkson.edu,imap.gmail.com,993,smtp.gmail.com,587
 odu.edu,imap.gmail.com,993,smtp.gmail.com,587
-
+utdallas.edu,outlook.office365.com,993,smtp.office365.com,587