diff --git a/Mail-Transport-3.007.tar.gz b/Mail-Transport-3.007.tar.gz
deleted file mode 100644
index 98090a7..0000000
--- a/Mail-Transport-3.007.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:4c03fc6356933060ae25b8ac3eafc181a85e7168ed7b32e16ff4a4938a62428d
-size 17427
diff --git a/Mail-Transport-4.00.tar.gz b/Mail-Transport-4.00.tar.gz
new file mode 100644
index 0000000..8445218
--- /dev/null
+++ b/Mail-Transport-4.00.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:db5945504c27bb2e33db59b069ba3bec992e2227f617caee48eedf8759011d3c
+size 17329
diff --git a/perl-Mail-Transport.changes b/perl-Mail-Transport.changes
index cd978ff..8558eed 100644
--- a/perl-Mail-Transport.changes
+++ b/perl-Mail-Transport.changes
@@ -1,3 +1,23 @@
+-------------------------------------------------------------------
+Fri Dec 12 05:38:42 UTC 2025 - Tina Müller <timueller+perl@suse.de>
+
+- updated to 4.0.0 (4.00)
+   see /usr/share/doc/packages/perl-Mail-Transport/ChangeLog
+
+  #!!! Mail::Box 3 compatibility is still maintained on github in branch
+  #!!! maint3, and published.  So: you may find newer versions with major
+  #!!! number 3.  Use (at least) version 4 for new developments.
+  #!!! Convert? See https://github.com/markov2/perl5-Mail-Box/wiki/
+  version 4.00: Thu 11 Dec 13:42:25 CET 2025
+  	Changes:
+  	- use Mail::Box 4 exception model: use Log::Report
+  	- remove Carp
+  version 3.008:
+  	Improvements:
+  	- convert install to OODoc 3.05
+  	- restyle code to OODoc 3 standard
+  	- explicitly depend on Mail::Message v3, not 4
+
 -------------------------------------------------------------------
 Tue Oct  7 12:46:39 UTC 2025 - Tina Müller <timueller+perl@suse.de>
 
diff --git a/perl-Mail-Transport.spec b/perl-Mail-Transport.spec
index 1ea6cdd..de4008a 100644
--- a/perl-Mail-Transport.spec
+++ b/perl-Mail-Transport.spec
@@ -18,10 +18,10 @@
 
 %define cpan_name Mail-Transport
 Name:           perl-Mail-Transport
-Version:        3.7.0
+Version:        4.0.0
 Release:        0
-# 3.007 -> normalize -> 3.7.0
-%define cpan_version 3.007
+# 4.00 -> normalize -> 4.0.0
+%define cpan_version 4.00
 License:        Artistic-1.0 OR GPL-1.0-or-later
 Summary:        Email message exchange
 URL:            https://metacpan.org/release/%{cpan_name}
@@ -31,8 +31,14 @@ Source100:      README.md
 BuildArch:      noarch
 BuildRequires:  perl
 BuildRequires:  perl-macros
-BuildRequires:  perl(Mail::Reporter) >= 3
-Requires:       perl(Mail::Reporter) >= 3
+BuildRequires:  perl(Log::Report) >= 1.420
+BuildRequires:  perl(Mail::Reporter) >= 4
+BuildRequires:  perl(String::Print) >= 1.10
+BuildRequires:  perl(Test::More) >= 1
+BuildRequires:  perl(Test::Pod) >= 1
+Requires:       perl(Log::Report) >= 1.420
+Requires:       perl(Mail::Reporter) >= 4
+Requires:       perl(String::Print) >= 1.10
 Provides:       perl(Mail::Transport) = %{version}
 Provides:       perl(Mail::Transport::Exim) = %{version}
 Provides:       perl(Mail::Transport::Mailx) = %{version}
@@ -48,6 +54,11 @@ Provides:       perl(Mail::Transport::Sendmail) = %{version}
 Objects which extend 'Mail::Transport' implement sending and/or receiving
 of messages, using various protocols.
 
+*Be aware:* This module versions 4.00 and up is not fully compatible with
+older releases: mainly the exception handling has changed. When you need to
+upgrade, please read _https://github.com/markov2/perl5-Mail-Box/wiki/_
+*Version 3 is still maintained* and may see new releases as well.
+
 Mail::Transport::Send extends this class, and offers general functionality
 for send protocols, like SMTP. Mail::Transport::Receive also extends this
 class, and offers receive method. Some transport protocols will implement
@@ -71,6 +82,6 @@ make test
 %perl_gen_filelist
 
 %files -f %{name}.files
-%doc ChangeLog README README.md
+%doc ChangeLog README.md
 
 %changelog