diff --git a/modules/programs/neomutt.nix b/modules/programs/neomutt.nix
index b8c793f8..5ee38e2a 100644
--- a/modules/programs/neomutt.nix
+++ b/modules/programs/neomutt.nix
@@ -189,6 +189,7 @@ let
       # GPG section
       set crypt_use_gpgme = yes
       set crypt_autosign = ${yesno (gpg.signByDefault or false)}
+      set crypt_opportunistic_encrypt = ${yesno (gpg.encryptByDefault or false)}
       set pgp_use_gpg_agent = yes
       set mbox_type = ${if maildir != null then "Maildir" else "mbox"}
       set sort = "${cfg.sort}"
diff --git a/tests/modules/programs/neomutt/default.nix b/tests/modules/programs/neomutt/default.nix
index 40ca4b02..b26923f7 100644
--- a/tests/modules/programs/neomutt/default.nix
+++ b/tests/modules/programs/neomutt/default.nix
@@ -6,4 +6,5 @@
   neomutt-with-binds-with-warning = ./neomutt-with-binds-with-warning.nix;
   neomutt-with-binds-invalid-settings =
     ./neomutt-with-binds-invalid-settings.nix;
+  neomutt-with-gpg = ./neomutt-with-gpg.nix;
 }
diff --git a/tests/modules/programs/neomutt/hm-example.com-expected b/tests/modules/programs/neomutt/hm-example.com-expected
index 9181612c..6c96f61f 100644
--- a/tests/modules/programs/neomutt/hm-example.com-expected
+++ b/tests/modules/programs/neomutt/hm-example.com-expected
@@ -5,6 +5,7 @@ set certificate_file=/etc/ssl/certs/ca-certificates.crt
 # GPG section
 set crypt_use_gpgme = yes
 set crypt_autosign = no
+set crypt_opportunistic_encrypt = no
 set pgp_use_gpg_agent = yes
 set mbox_type = Maildir
 set sort = "threads"
diff --git a/tests/modules/programs/neomutt/hm-example.com-gpg-expected.conf b/tests/modules/programs/neomutt/hm-example.com-gpg-expected.conf
new file mode 100644
index 00000000..f7763dbe
--- /dev/null
+++ b/tests/modules/programs/neomutt/hm-example.com-gpg-expected.conf
@@ -0,0 +1,32 @@
+# Generated by Home Manager.
+set ssl_force_tls = yes
+set certificate_file=/etc/ssl/certs/ca-certificates.crt
+
+# GPG section
+set crypt_use_gpgme = yes
+set crypt_autosign = yes
+set crypt_opportunistic_encrypt = yes
+set pgp_use_gpg_agent = yes
+set mbox_type = Maildir
+set sort = "threads"
+
+# MTA section
+set smtp_pass="`password-command`"
+set smtp_url='smtps://home.manager@smtp.example.com'
+
+
+
+
+
+# MRA section
+set folder='/home/hm-user/Mail/hm@example.com'
+set from='hm@example.com'
+set postponed='+Drafts'
+set realname='H. M. Test'
+set record='+Sent'
+set spoolfile='+Inbox'
+set trash='+Trash'
+
+
+# Extra configuration
+
diff --git a/tests/modules/programs/neomutt/hm-example.com-msmtp-expected.conf b/tests/modules/programs/neomutt/hm-example.com-msmtp-expected.conf
index 925c7063..d2e2f3ee 100644
--- a/tests/modules/programs/neomutt/hm-example.com-msmtp-expected.conf
+++ b/tests/modules/programs/neomutt/hm-example.com-msmtp-expected.conf
@@ -5,6 +5,7 @@ set certificate_file=/etc/ssl/certs/ca-certificates.crt
 # GPG section
 set crypt_use_gpgme = yes
 set crypt_autosign = no
+set crypt_opportunistic_encrypt = no
 set pgp_use_gpg_agent = yes
 set mbox_type = Maildir
 set sort = "threads"
diff --git a/tests/modules/programs/neomutt/neomutt-with-gpg.nix b/tests/modules/programs/neomutt/neomutt-with-gpg.nix
new file mode 100644
index 00000000..164e4b58
--- /dev/null
+++ b/tests/modules/programs/neomutt/neomutt-with-gpg.nix
@@ -0,0 +1,33 @@
+{ config, lib, pkgs, ... }:
+with lib; {
+  imports = [ ../../accounts/email-test-accounts.nix ];
+
+  config = {
+    accounts.email.accounts = {
+      "hm@example.com" = {
+        gpg = {
+          encryptByDefault = true;
+          signByDefault = true;
+        };
+        neomutt.enable = true;
+        imap.port = 993;
+      };
+    };
+
+    programs.neomutt.enable = true;
+
+    nixpkgs.overlays =
+      [ (self: super: { neomutt = pkgs.writeScriptBin "dummy-neomutt" ""; }) ];
+
+    nmt.script = ''
+      assertFileExists home-files/.config/neomutt/neomuttrc
+      assertFileExists home-files/.config/neomutt/hm@example.com
+      assertFileContent home-files/.config/neomutt/neomuttrc ${
+        ./neomutt-expected.conf
+      }
+      assertFileContent home-files/.config/neomutt/hm@example.com ${
+        ./hm-example.com-gpg-expected.conf
+      }
+    '';
+  };
+}