diff --git a/domains.csv b/domains.csv
index 9d6e653..628b233 100644
--- a/domains.csv
+++ b/domains.csv
@@ -167,6 +167,7 @@ tfwno.gf,mail.cock.li,993,mail.cock.li,587
 tlen.pl,poczta.o2.pl,993,poczta.o2.pl,465
 tu-harburg.de,mail.tu-harburg.de,993,mail.tu-harburg.de,587
 tuhh.de,mail.tu-harburg.de,993,mail.tu-harburg.de,587
+txstate.edu,outlook.office365.com,993,smtp.office365.com,587
 uach.mx,imap.gmail.com,993,smtp.gmail.com,587
 uoregon.edu,imap.uoregon.edu,993,smtp.uoregon.edu,587
 uqtr.ca,outlook.office365.com,993,smtp.office365.com,587