Jun 272016
 

SMTPUTF8 is one of extended/enhanced SMTP feature. The protocol format was defined in RFC 6531.Latest postfix-3.1, support for SMTPUTF8 feature (since version 2.12) and this is how to install/compile it on CentOS 7.

Install libicu-devel, if it’s not install yet.

# yum -y install libicu-devel

Download postfix-3.1 rpm source

# wget http://repos.oostergo.net/7/SRPMS/postfix-3.1.1-1.el7.centos.src.rpm

Rebuild the source

# rpmbuild --rebuild postfix-3.1.1-1.el7.centos.src.rpm

Upgrade existing postfix

# cd rpmbuild/RPMS/x86_64/
# rpm -Uvh postfix-3.1.1-1.el7.centos.x86_64.rpm postfix-perl-scripts-3.1.1-1.el7.centos.x86_64.rpm

Test it

# telnet localhost 25
Trying ::1...
Connected to localhost.
Escape character is '^]'.
220 web-server.localdomain ESMTP Postfix
ehlo localhost
250-web-server.localdomain
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250 SMTPUTF8

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