Category Archives: Mail Server

Setup DKIM keys with Sendmail


The purpose of this document is to enable DKIM keys setup on sendmail server so that email delivery into inboxes can be maximized.

How to enable quota on Postfix Virtual & Local Mailboxes

1. To enable mailbox quotas throughout postfix configuration, we need to configure file of postfix.

Postfix Masquerading or changing outgoing address

Address rewriting allows changing outgoing email ID or domain name itself. This is good for hiding internal user names. For example:

Using Sendmail as smarthost with User Authentication

  • Check whether the SMTP port number is open on the intended SMTP server or not by giving the following command:

Sendmail with MAILDIR format delivery

  • First you need to setup sendmail to handle mail delivery by procmail. In /etc/mail/ file edit the following line as follows: