From f6e80d917d9cb182d164ee735822cab1236007c7 Mon Sep 17 00:00:00 2001
From: M66B <M66B@users.noreply.github.com>
Date: Sun, 12 Nov 2023 13:43:10 +0100
Subject: [PATCH] DMARC: added support for a records

---
 .../java/eu/faircode/email/ActivityDmarc.java  | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/eu/faircode/email/ActivityDmarc.java b/app/src/main/java/eu/faircode/email/ActivityDmarc.java
index 791f8e3323..9050006152 100644
--- a/app/src/main/java/eu/faircode/email/ActivityDmarc.java
+++ b/app/src/main/java/eu/faircode/email/ActivityDmarc.java
@@ -296,8 +296,24 @@ public class ActivityDmarc extends ActivityBase {
                                                                     because = ip + " in " + p.first;
                                                                     break;
                                                                 }
-                                                            } else if ("mx".equals(ip))
+                                                            } else if ("a".equals(ip))
                                                                 try {
+                                                                    // TODO: <domain>/<prefix-length>
+                                                                    DnsHelper.DnsRecord[] as =
+                                                                            DnsHelper.lookup(context, p.first, "a");
+                                                                    for (DnsHelper.DnsRecord a : as)
+                                                                        if (text.equals(a.response)) {
+                                                                            valid = true;
+                                                                            because = ip + " in " + p.first;
+                                                                            break;
+                                                                        }
+                                                                    if (valid)
+                                                                        break;
+                                                                } catch (UnknownHostException ignored) {
+                                                                }
+                                                            else if ("mx".equals(ip))
+                                                                try {
+                                                                    // TODO: <domain>/<prefix-length>
                                                                     DnsHelper.DnsRecord[] mxs =
                                                                             DnsHelper.lookup(context, p.first, "mx");
                                                                     for (DnsHelper.DnsRecord mx : mxs) {