Update domains.csv (#498)

share/domains.csv

@@ -317,3 +317,4 @@ ymail.com,imap.mail.yahoo.com,993,smtp.mail.yahoo.com,465
 zaclys.net,mail.zaclys.net,993,mail.zaclys.net,465
 zoho.com,imap.zoho.com,993,smtp.zoho.com,465
 zohomail.eu,imap.zoho.eu,993,smtp.zoho.eu,465
+student.utwente.nl,imap.gmail.com,993,smtp.gmail.com,587