Add hamburg university of technology mailserver

autoconf/domains.csv

@@ -103,3 +103,5 @@ narod.ru,imap.yandex.com,993,smtp.yandex.com,465
 muny.us,mail.muny.us,993,mail.muny.us,465
 billycarlyle.uk,mail.muny.us,993,mail.muny.us,465
 mailbox.org,imap.mailbox.org,993,smtp.mailbox.org,465
+tuhh.de,mail.tu-harburg.de,993,mail.tu-harburg.de,587
+tu-harburg.de,mail.tu-harburg.de,993,mail.tu-harburg.de,587