diff --git a/script/cibuild b/script/cibuild
index 629cab15..60a592ba 100755
--- a/script/cibuild
+++ b/script/cibuild
@@ -6,6 +6,7 @@ if command -v apt-get &>/dev/null; then
 	sudo apt-get install python3
 fi
 
+failed=0
 
 if [ x"$SPEC" = "xtrue" ]; then
 	cargo build --verbose --release
@@ -14,22 +15,41 @@ if [ x"$SPEC" = "xtrue" ]; then
 
 	PROGRAM_ARG="--program=../../../target/release/comrak --syntax-highlighting none"
 
-	python3 spec_tests.py --no-normalize --spec spec.txt "$PROGRAM_ARG"
-	python3 pathological_tests.py "$PROGRAM_ARG"
-	python3 roundtrip_tests.py --spec spec.txt "$PROGRAM_ARG"
-	python3 entity_tests.py "$PROGRAM_ARG"
-	python3 spec_tests.py --no-normalize --spec smart_punct.txt "$PROGRAM_ARG --smart"
-
-	python3 spec_tests.py --no-normalize --spec extensions.txt "$PROGRAM_ARG" --extensions "table strikethrough autolink tagfilter footnotes tasklist"
-	python3 roundtrip_tests.py --spec extensions.txt "$PROGRAM_ARG" --extensions "table strikethrough autolink tagfilter footnotes tasklist"
-	# python3 roundtrip_tests.py --spec extensions-table-prefer-style-attributes.txt "$PROGRAM_ARG --table-prefer-style-attributes" --extensions "table strikethrough autolink tagfilter footnotes tasklist"
-	python3 roundtrip_tests.py --spec extensions-full-info-string.txt "$PROGRAM_ARG --full-info-string"
-
-	python3 spec_tests.py --no-normalize --spec regression.txt "$PROGRAM_ARG"
+	set +e
+	python3 spec_tests.py --no-normalize --spec spec.txt "$PROGRAM_ARG" \
+		|| failed=1
+	python3 pathological_tests.py "$PROGRAM_ARG" \
+		|| failed=1
+	python3 roundtrip_tests.py --spec spec.txt "$PROGRAM_ARG" \
+		|| failed=1
+	python3 entity_tests.py "$PROGRAM_ARG" \
+		|| failed=1
+	python3 spec_tests.py --no-normalize --spec smart_punct.txt "$PROGRAM_ARG --smart" \
+		|| failed=1
+
+	python3 spec_tests.py --no-normalize --spec extensions.txt "$PROGRAM_ARG" --extensions "table strikethrough autolink tagfilter footnotes tasklist" \
+		|| failed=1
+	python3 roundtrip_tests.py --spec extensions.txt "$PROGRAM_ARG" --extensions "table strikethrough autolink tagfilter footnotes tasklist" \
+		|| failed=1
+	# python3 roundtrip_tests.py --spec extensions-table-prefer-style-attributes.txt "$PROGRAM_ARG --table-prefer-style-attributes" --extensions "table strikethrough autolink tagfilter footnotes tasklist" || failed=1
+	python3 roundtrip_tests.py --spec extensions-full-info-string.txt "$PROGRAM_ARG --full-info-string" \
+		|| failed=1
+
+	python3 spec_tests.py --no-normalize --spec regression.txt "$PROGRAM_ARG" \
+		|| failed=1
+	set -e
 else
-	cargo build --verbose
-	cargo build --verbose --examples
-
-	cargo test --verbose
-	cargo run --example sample
+	set +e
+	cargo build --verbose \
+		|| failed=1
+	cargo build --verbose --examples \
+		|| failed=1
+
+	cargo test --verbose \
+		|| failed=1
+	cargo run --example sample \
+		|| failed=1
+	set -e
 fi
+
+exit $failed
diff --git a/src/parser/autolink.rs b/src/parser/autolink.rs
index 8a9b3aff..b5d17b17 100644
--- a/src/parser/autolink.rs
+++ b/src/parser/autolink.rs
@@ -278,6 +278,8 @@ fn email_match<'a>(
 
     let size = contents.len();
 
+    let mut auto_mailto = true;
+    let mut is_xmpp = false;
     let mut rewind = 0;
 
     while rewind < i {
@@ -288,6 +290,21 @@ fn email_match<'a>(
             continue;
         }
 
+        if c == b':' {
+            if validate_protocol("mailto", contents, i - rewind - 1) {
+                auto_mailto = false;
+                rewind += 1;
+                continue;
+            }
+
+            if validate_protocol("xmpp", contents, i - rewind - 1) {
+                is_xmpp = true;
+                auto_mailto = false;
+                rewind += 1;
+                continue;
+            }
+        }
+
         break;
     }
 
@@ -307,6 +324,8 @@ fn email_match<'a>(
             return None;
         } else if c == b'.' && link_end < size - i - 1 && isalnum(contents[i + link_end + 1]) {
             np += 1;
+        } else if c == b'/' && is_xmpp {
+            // xmpp allows a `/` in the url
         } else if c != b'-' && c != b'_' {
             break;
         }
@@ -326,7 +345,11 @@ fn email_match<'a>(
         return None;
     }
 
-    let mut url = "mailto:".to_string();
+    let mut url = if auto_mailto {
+        "mailto:".to_string()
+    } else {
+        "".to_string()
+    };
     let text = str::from_utf8(&contents[i - rewind..link_end + i]).unwrap();
     url.push_str(text);
 
@@ -346,3 +369,15 @@ fn email_match<'a>(
     ));
     Some((inl, rewind, rewind + link_end))
 }
+
+fn validate_protocol(protocol: &str, contents: &[u8], cursor: usize) -> bool {
+    let size = contents.len();
+    let mut rewind = 0;
+
+    while rewind < cursor && isalpha(contents[cursor - rewind - 1]) {
+        rewind += 1;
+    }
+
+    size - cursor + rewind >= protocol.len()
+        && &contents[cursor - rewind..cursor] == protocol.as_bytes()
+}
diff --git a/vendor/cmark-gfm b/vendor/cmark-gfm
index fd023f62..2f13eeed 160000
--- a/vendor/cmark-gfm
+++ b/vendor/cmark-gfm
@@ -1 +1 @@
-Subproject commit fd023f629d2f9fb8e25fd239f01f48a0c453172d
+Subproject commit 2f13eeedfe9906c72a1843b03552550af7bee29a