diff --git a/tests/data/Makefile.am b/tests/data/Makefile.am
index bb896f4d2..c3d730fa3 100644
--- a/tests/data/Makefile.am
+++ b/tests/data/Makefile.am
@@ -69,7 +69,7 @@ test818 test819 test820 test821 test822 test823 test824 \
 \
 test850 test851 test852 test853 test854 test855 test856 test857 test858 \
 test859 test860 test861 test862 test863 test864 test865 test866 test867 \
-test868 test869 test870 \
+test868 test869 test870 test871 \
 \
 test900 test901 test902 test903 test904 test905 test906 test907 test908 \
 test909 test910 test911 test912 test913 test914 test915 test916 test917 \
diff --git a/tests/data/test871 b/tests/data/test871
new file mode 100644
index 000000000..c24279f87
--- /dev/null
+++ b/tests/data/test871
@@ -0,0 +1,54 @@
+<testcase>
+<info>
+<keywords>
+POP3
+POP3 AUTH PLAIN SASL-IR
+RFC1734
+RFC4616
+RFC5034
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<servercmd>
+AUTH PLAIN
+REPLY AUTH +OK Login successful
+</servercmd>
+<data>
+From: me@somewhere
+To: fake@nowhere
+
+body
+
+--
+  yours sincerely
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+pop3
+</server>
+ <name>
+POP3 plain authentication with initial response
+ </name>
+ <command>
+pop3://%HOSTIP:%POP3PORT/871 -u user:secret --sasl-ir
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<protocol>
+CAPA
+AUTH PLAIN dXNlcgB1c2VyAHNlY3JldA==
+RETR 871
+QUIT
+</protocol>
+</verify>
+</testcase>