FAQforge » Email http://www.faqforge.com Just another WordPress weblog Wed, 01 Sep 2010 10:19:51 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 How to enable port 587 (submission) in postfixhttp://www.faqforge.com/linux/how-to-enable-port-587-submission-in-postfix/ http://www.faqforge.com/linux/how-to-enable-port-587-submission-in-postfix/#comments Mon, 26 Apr 2010 09:36:13 +0000 Till http://www.faqforge.com/?p=458

Some internet access providers have port 25 disabled in their routers to prevent spam. If you run your own mailserver in a datacenter, you might have to enable the submission port (587) in postfix to be able to send emails from your local email client to your own mailserver.

To enable port 587, edit the file /etc/postfix/master.cf

vi /etc/postfix/master.cf


and remove the # in front of the line:

#submission inet n      -       n       -       -       smtpd


so that it looks like this:

submission inet n      -       n       -       -       smtpd


and restart postfix:

/etc/init.d/postfix restart

]]> http://www.faqforge.com/linux/how-to-enable-port-587-submission-in-postfix/feed/ 0 How to renew the SSL certificate for dovecot on CentOShttp://www.faqforge.com/linux/how-to-renew-the-ssl-certificate-for-dovecot-on-centos/ http://www.faqforge.com/linux/how-to-renew-the-ssl-certificate-for-dovecot-on-centos/#comments Wed, 23 Dec 2009 17:00:08 +0000 Till http://www.faqforge.com/?p=355

Make a backup of the old key and certificate file

mv /etc/ssl/certs/dovecot.pem /etc/ssl/certs/dovecot.pem.old
mv /etc/ssl/private/dovecot.key /etc/ssl/private/dovecot.key.old

Create the new SSL certificate
openssl genrsa -out /etc/ssl/private/dovecot.key 1024
openssl req -new -x509 -key /etc/ssl/private/dovecot.key -out /etc/ssl/certs/dovecot.pem -days 730

Restart Dovecot:

/etc/init.d/dovecot restart

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