diff -r 003b08bb3f25 -r b1fc8aed5969 src/main/webapp/WEB-INF/jsp/issue-view.jsp
--- a/src/main/webapp/WEB-INF/jsp/issue-view.jsp	Fri Dec 18 16:09:20 2020 +0100
+++ b/src/main/webapp/WEB-INF/jsp/issue-view.jsp	Fri Dec 18 16:16:54 2020 +0100
@@ -173,7 +173,13 @@
         <div class="comment">
             <div class="caption">
                 <c:if test="${not empty comment.author}">
+                    <c:if test="${not empty comment.author.mail}">
+                        <a href="mailto:${comment.author.mail}">
+                    </c:if>
                     <c:out value="${comment.author.displayname}"/>
+                    <c:if test="${not empty comment.author.mail}">
+                        </a>
+                    </c:if>
                 </c:if>
                 <c:if test="${empty comment.author}">
                     <fmt:message key="issue.comments.anonauthor"/>