diff --git a/esmtp-1.2-fix-segfault-on-empty-to-in-headers.patch b/esmtp-1.2-fix-segfault-on-empty-to-in-headers.patch
new file mode 100644
index 0000000..99a9b1b
--- /dev/null
+++ b/esmtp-1.2-fix-segfault-on-empty-to-in-headers.patch
@@ -0,0 +1,24 @@
+Description: Don't segfault if recipient header is empty
+Origin: vendor
+Bug-Debian: https://bugs.debian.org/636346
+Forwarded: no
+Author: Salvatore Bonaccorso <carnil@debian.org>
+Last-Update: 2011-08-02
+
+--- a/local.c
++++ b/local.c
+@@ -106,7 +106,13 @@
+ 				}
+ 				p += written;
+ 			}
+-			names[--nameslen] = '\0';		/* chop trailing space */
++			if(nameslen > 0)
++			{
++				names[--nameslen] = '\0';		/* chop trailing space */
++			} else {
++				fprintf(stderr, "Failed to parse recipient header\n");
++				exit(EX_DATAERR);
++			}
+ 		} else {
+ 			nameslen = (strlen(force_mda) + 3);	// 'force_mda'
+ 			names = (char *)xmalloc(nameslen + 1);	// 'force_mda'\0
diff --git a/esmtp-1.2-libesmtp-1.1.0.patch b/esmtp-1.2-libesmtp-1.1.0.patch
new file mode 100644
index 0000000..48551e6
--- /dev/null
+++ b/esmtp-1.2-libesmtp-1.1.0.patch
@@ -0,0 +1,31 @@
+From 32bf86868c32ddbb94d3c337005d3ac7fb41ecdf Mon Sep 17 00:00:00 2001
+From: a821 <a821@mail.de>
+Date: Mon, 16 Aug 2021 12:02:14 +0200
+Subject: [PATCH] Fix configure.ac since libesmtp-config was removed
+
+---
+ configure.ac | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index 64b19b4..696d861 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -30,11 +30,11 @@ then
+ 	AC_CHECK_HEADER(libesmtp.h, ,[AC_MSG_ERROR([libesmtp.h not found in $with_libesmtp])])
+ fi    
+ AC_MSG_CHECKING(for libESMTP)
+-if libesmtp-config --version > /dev/null 2>&1
++if pkg-config libesmtp-1.0 > /dev/null 2>&1
+ then
+ 	AC_MSG_RESULT(yes)
+-	CFLAGS="$CFLAGS `libesmtp-config --cflags`"
+-	LIBS="$LIBS `libesmtp-config --libs`"
++	CFLAGS="$CFLAGS `pkg-config libesmtp-1.0 --cflags`"
++	LIBS="$LIBS `pkg-config libesmtp-1.0 --libs`"
+ else
+ 	AC_MSG_RESULT(no)
+ 	AC_MSG_ERROR(libESMTP library not found)
+-- 
+2.32.0
+
diff --git a/esmtp.spec b/esmtp.spec
index e80508f..a22f5f4 100644
--- a/esmtp.spec
+++ b/esmtp.spec
@@ -1,6 +1,6 @@
 Name:          esmtp
 Version:       1.2
-Release:       1mamba
+Release:       2mamba
 Summary:       A user configurable relay-only MTA with a sendmail-compatible syntax
 Group:         System/Servers
 Vendor:        openmamba
@@ -8,12 +8,14 @@ Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           http://esmtp.sourceforge.net/
 Source:        http://downloads.sourceforge.net/project/esmtp/esmtp/%{version}/esmtp-%{version}.tar.bz2
+Patch0:        esmtp-1.2-libesmtp-1.1.0.patch
+Patch1:        esmtp-1.2-fix-segfault-on-empty-to-in-headers.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 BuildRequires: libesmtp-devel
 ## AUTOBUILDREQ-END
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
+BuildRequires: libesmtp-devel >= 1.1.0
 
 %description
 ESMTP MTA is a user configurable relay-only MTA with a sendmail-compatible syntax, based on libESMTP and supporting the AUTH (including the CRAM-MD5 and NTLM SASL mechanisms) and the StartTLS SMTP extensions.
@@ -22,6 +24,9 @@ ESMTP MTA is a user configurable relay-only MTA with a sendmail-compatible synta
 
 %prep
 %setup -q
+%patch0 -p1
+%patch1 -p1 -b .fix-segfault-on-empty-to-in-headers
+autoconf
 
 %build
 %configure
@@ -41,13 +46,16 @@ ESMTP MTA is a user configurable relay-only MTA with a sendmail-compatible synta
 %{_bindir}/newaliases
 %{_libdir}/sendmail
 %{_sbindir}/sendmail
-%{_mandir}/man1/esmtp.1.gz
-%{_mandir}/man1/mailq.1.gz
-%{_mandir}/man1/newaliases.1.gz
-%{_mandir}/man1/sendmail.1.gz
-%{_mandir}/man5/esmtprc.5.gz
+%{_mandir}/man1/esmtp.1*
+%{_mandir}/man1/mailq.1*
+%{_mandir}/man1/newaliases.1*
+%{_mandir}/man1/sendmail.1*
+%{_mandir}/man5/esmtprc.5*
 %doc AUTHORS COPYING
 
 %changelog
+* Sat Nov 27 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 1.2-2mamba
+- rebuilt with libesmtp 1.1.0
+
 * Sat Jan 26 2013 Silvan Calarco <silvan.calarco@mambasoft.it> 1.2-1mamba
 - package created by silvan using the webbuild interface