How to install and configure sSMTP on CentOS / Fedora / Redhat

Is it possible to have that be sent via an external SMTP server, like G-mail ?

Yes, use sSMTP for replace sendmail

I have install the ssmtp to CentOS3.9 successfully

wget http://ftp.riken.jp/Linux/fedora/epel/4/SRPMS/ssmtp-2.61-15.el4.src.rpm

rpm -Uhv krb5-* –oldpackage # install krb5-devel

rpm -ihv ssmtp-2.61-15.el4.src.rpm

cd /usr/src/redhat/SPECS

vi ssmtp.spec

….

%build

#on RHEL3 krb5 is somewhere else

#test -e /usr/include/krb5.h || CPPFLAGS="-I/usr/kerberos/include"

#CPPFLAGS=$(pkg-config –cflags-only-I openssl)

%define cppflags -I/usr/kerberos/include

%configure –enable-ssl –enable-md5auth –enable-inet6

make %{?_smp_mflags} CPPFLAGS=%{cppflags}

%install

….

rpmbuild -bb ssmtp.spec

rpm -Uhv /usr/src/redhat/RPMS/i386/ssmtp-2.61-15.i386.rpm –force

rm -f /etc/alternatives/mta

ln -s /usr/sbin/ssmtp /etc/alternatives/mta

vi /etc/ssmtp/ssmtp.conf

—————

root=phillips

mailhub=10.1.10.35

Hostname=h141-100.falconstor.com.tw

FromLineOverride=YES
UseTLS=NO