6 files changed, 6 insertions, 6 deletions
diff --git a/pkgs/servers/mail/dovecot/default.nix b/pkgs/servers/mail/dovecot/default.nix
index c9065d041618..55070a48b7d0 100644
--- a/pkgs/servers/mail/dovecot/default.nix
+++ b/pkgs/servers/mail/dovecot/default.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
     ++ lib.optional withSQLite sqlite;
 
   src = fetchurl {
-    url = "http://dovecot.org/releases/2.3/${name}.tar.gz";
+    url = "https://dovecot.org/releases/2.3/${name}.tar.gz";
     sha256 = "14zva4f8k64x86sm9n21cp2yvrpph6k6k52bm22a00pxjwdq50q8";
   };
 
diff --git a/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix b/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix
index e98c58c891a1..a393df3d8bda 100644
--- a/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix
+++ b/pkgs/servers/mail/dovecot/plugins/pigeonhole/default.nix
@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "0.5.1";
 
   src = fetchurl {
-    url = "http://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-${version}.tar.gz";
+    url = "https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-${version}.tar.gz";
     sha256 = "0ivmaxic6cygfphvlrvy0xgggydm7j7kjv1ssfqbr08q4rcsmc73";
   };
 
diff --git a/pkgs/servers/mail/exim/default.nix b/pkgs/servers/mail/exim/default.nix
index 393ce2c5cda9..87d9e5042990 100644
--- a/pkgs/servers/mail/exim/default.nix
+++ b/pkgs/servers/mail/exim/default.nix
@@ -6,7 +6,7 @@ stdenv.mkDerivation rec {
   name = "exim-4.91";
 
   src = fetchurl {
-    url = "http://ftp.exim.org/pub/exim/exim4/${name}.tar.xz";
+    url = "https://ftp.exim.org/pub/exim/exim4/${name}.tar.xz";
     sha256 = "066ip7a5lqfn9rcr14j4nm0kqysw6mzvbbb0ip50lmfm0fqsqmzc";
   };
 
diff --git a/pkgs/servers/mail/nullmailer/default.nix b/pkgs/servers/mail/nullmailer/default.nix
index f17f3ed2de7e..ab632372b464 100644
--- a/pkgs/servers/mail/nullmailer/default.nix
+++ b/pkgs/servers/mail/nullmailer/default.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
   name = "nullmailer-${version}";
 
   src = fetchurl {
-    url = "http://untroubled.org/nullmailer/nullmailer-${version}.tar.gz";
+    url = "https://untroubled.org/nullmailer/nullmailer-${version}.tar.gz";
     sha256 = "0gykh0qc86rk0knfvp8ndqkryal3pvqdfdya94wvb6n1cc8p3ild";
   };
 
diff --git a/pkgs/servers/mail/postfix/pflogsumm.nix b/pkgs/servers/mail/postfix/pflogsumm.nix
index a9ec36f59ca9..3d48e9527819 100644
--- a/pkgs/servers/mail/postfix/pflogsumm.nix
+++ b/pkgs/servers/mail/postfix/pflogsumm.nix
@@ -6,7 +6,7 @@ buildPerlPackage rec {
   version = "1.1.3";
 
   src = fetchurl {
-    url = "http://jimsun.linxnet.com/downloads/${name}.tar.gz";
+    url = "https://jimsun.linxnet.com/downloads/${name}.tar.gz";
     sha256 = "0hkim9s5f1yg5sfs5048jydhy3sbxafls496wcjk0cggxb113py4";
   };
 
diff --git a/pkgs/servers/mail/postgrey/default.nix b/pkgs/servers/mail/postgrey/default.nix
index 1836d0e5cf36..3e7163cb1541 100644
--- a/pkgs/servers/mail/postgrey/default.nix
+++ b/pkgs/servers/mail/postgrey/default.nix
@@ -12,7 +12,7 @@ let
     name = "postgrey-${version}";
 in runCommand name {
   src = fetchurl {
-    url = "http://postgrey.schweikert.ch/pub/${name}.tar.gz";
+    url = "https://postgrey.schweikert.ch/pub/${name}.tar.gz";
     sha256 = "1xx51xih4711vrvc6d57il9ccallbljj5zhgqdb07jzmz11rakgz";
   };
   meta = with stdenv.lib; {