diff --git a/modules/programs/aerc/accounts.nix b/modules/programs/aerc/accounts.nix
index 050352ee9..466c2fbc5 100644
--- a/modules/programs/aerc/accounts.nix
+++ b/modules/programs/aerc/accounts.nix
@@ -3,6 +3,8 @@
   lib,
   confSections,
   confSection,
+  writeText,
+  writeShellScript,
   ...
 }:
 let
@@ -288,11 +290,40 @@ in
           pgp-opportunistic-encrypt = account.gpg.encryptByDefault;
         };
 
+      signatureCfg =
+        account:
+        # TODO: aerc does not support attaching signatures yet.
+        # Until someone needs it, we will just ignore it for now.
+        if account.signature.showSignature == "append" then
+          if account.signature.command != null then
+            {
+              signature-cmd = writeShellScript "aerc-signature.sh" (
+                lib.concatStringsSep "\n" [
+                  ''printf '%s\n' "${account.signature.delimiter}"''
+                  account.signature.command
+                ]
+              );
+            }
+          else
+            {
+              signature-file = writeText "aerc-signature.txt" (
+                lib.concatStringsSep "\n" [
+                  account.signature.delimiter
+                  account.signature.text
+                ]
+              );
+            }
+        else
+          { };
+
     in
-    (basicCfg account)
-    // (sourceCfg account)
-    // (outgoingCfg account)
-    // (gpgCfg account)
+    builtins.foldl' (acc: f: acc // f account) { } [
+      basicCfg
+      sourceCfg
+      outgoingCfg
+      gpgCfg
+      signatureCfg
+    ]
     // account.aerc.extraAccounts;
 
   mkAccountConfig = name: account: mapAttrNames (addAccountName name) account.aerc.extraConfig;
diff --git a/modules/programs/aerc/default.nix b/modules/programs/aerc/default.nix
index 8ee5546a1..804e5113f 100644
--- a/modules/programs/aerc/default.nix
+++ b/modules/programs/aerc/default.nix
@@ -40,11 +40,11 @@ let
   accounts = import ./accounts.nix {
     inherit
       config
-      pkgs
       lib
       confSection
       confSections
       ;
+    inherit (pkgs) writeText writeShellScript;
   };
 
   aerc-accounts = attrsets.filterAttrs (_: v: v.aerc.enable) config.accounts.email.accounts;
diff --git a/tests/modules/programs/aerc/extraAccounts.expected b/tests/modules/programs/aerc/extraAccounts.expected
index 0697d9611..050c92939 100644
--- a/tests/modules/programs/aerc/extraAccounts.expected
+++ b/tests/modules/programs/aerc/extraAccounts.expected
@@ -91,3 +91,11 @@ from = test <test@email.invalid>
 outgoing = imap+plain://intentionallyWrong:PaSsWorD@smtp.host.invalid:1337
 postpone = dRaFts
 source = smtp+plain://intentionallyWrong:PaSsWorD@smtp.host.invalid:1337
+
+[q_signature_text]
+from = Foo Bar <addr@mail.invalid>
+signature-file = /nix/store/00000000000000000000000000000000-aerc-signature.txt
+
+[r_signature_command]
+from = Foo Bar <addr@mail.invalid>
+signature-cmd = /nix/store/00000000000000000000000000000000-aerc-signature.sh
diff --git a/tests/modules/programs/aerc/settings.nix b/tests/modules/programs/aerc/settings.nix
index 32682be5a..de8d3308c 100644
--- a/tests/modules/programs/aerc/settings.nix
+++ b/tests/modules/programs/aerc/settings.nix
@@ -10,13 +10,18 @@
             "home-files/.config/aerc";
       in
       ''
-        assertFileContent   ${dir}/accounts.conf     ${./extraAccounts.expected}
-        assertFileContent   ${dir}/binds.conf        ${./extraBinds.expected}
-        assertFileContent   ${dir}/aerc.conf         ${./extraConfig.expected}
-        assertFileContent   ${dir}/templates/bar     ${./templates.expected}
-        assertFileContent   ${dir}/templates/foo     ${./templates.expected}
-        assertFileContent   ${dir}/stylesets/default ${./stylesets.expected}
-        assertFileContent   ${dir}/stylesets/asLines ${./stylesets.expected}
+        assertFileContent   $(normalizeStorePaths ${dir}/accounts.conf)     ${./extraAccounts.expected}
+        assertFileContent   $(normalizeStorePaths ${dir}/binds.conf)        ${./extraBinds.expected}
+        assertFileContent   $(normalizeStorePaths ${dir}/aerc.conf)         ${./extraConfig.expected}
+        assertFileContent   $(normalizeStorePaths ${dir}/templates/bar)     ${./templates.expected}
+        assertFileContent   $(normalizeStorePaths ${dir}/templates/foo)     ${./templates.expected}
+        assertFileContent   $(normalizeStorePaths ${dir}/stylesets/default) ${./stylesets.expected}
+        assertFileContent   $(normalizeStorePaths ${dir}/stylesets/asLines) ${./stylesets.expected}
+        assertFileContent   $(normalizeStorePaths ${dir}/stylesets/asLines) ${./stylesets.expected}
+
+        assertFileContent   $(normalizeStorePaths /nix/store/*-aerc-signature.sh)  ${./signature-command.expected}
+        assertFileContent   $(normalizeStorePaths /nix/store/*-aerc-signature.txt) ${./signature-file.expected}
+        assertFileContent   $(normalizeStorePaths /nix/store/*-user-signature.sh)  ${./signature-command-script.expected}
       '';
 
     programs.aerc = {
@@ -291,6 +296,26 @@
             };
           };
         };
+        q_signature_text = basics // {
+          signature = {
+            showSignature = "append";
+            delimiter = "~~~";
+            text = ''
+              some signature
+              goes here
+            '';
+          };
+        };
+        r_signature_command = basics // {
+          signature = {
+            showSignature = "append";
+            delimiter = "~~~";
+            command = pkgs.writeShellScript "user-signature.sh" ''
+              echo "some signature"
+              echo "goes here"
+            '';
+          };
+        };
       };
   };
 }
diff --git a/tests/modules/programs/aerc/signature-command-script.expected b/tests/modules/programs/aerc/signature-command-script.expected
new file mode 100644
index 000000000..177fe54c4
--- /dev/null
+++ b/tests/modules/programs/aerc/signature-command-script.expected
@@ -0,0 +1,4 @@
+#!/nix/store/00000000000000000000000000000000-bash/bin/bash
+echo "some signature"
+echo "goes here"
+
diff --git a/tests/modules/programs/aerc/signature-command.expected b/tests/modules/programs/aerc/signature-command.expected
new file mode 100644
index 000000000..f240d3ef5
--- /dev/null
+++ b/tests/modules/programs/aerc/signature-command.expected
@@ -0,0 +1,3 @@
+#!/nix/store/00000000000000000000000000000000-bash/bin/bash
+printf '%s\n' "~~~"
+/nix/store/00000000000000000000000000000000-user-signature.sh
diff --git a/tests/modules/programs/aerc/signature-file.expected b/tests/modules/programs/aerc/signature-file.expected
new file mode 100644
index 000000000..083e2d522
--- /dev/null
+++ b/tests/modules/programs/aerc/signature-file.expected
@@ -0,0 +1,3 @@
+~~~
+some signature
+goes here