==== Required information ====
- iRedMail version: 0.8.3
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  MySQL
- Linux/BSD distribution name and version: Ubuntu 12.04
- Related log if you're reporting an issue: /var/log/mail.log
====

Hi! Most of the time I receive mails without problems, but today I found out that Postfix rejects incoming mail that is sent by me from an external mail server:

Nov 29 14:22:20 taitava postfix/smtpd[21824]: NOQUEUE: reject: RCPT from unknown[62.242.33.164]: 553 5.7.1 <jarkko@taitavasti.fi>: Sender address rejected: not logged in; from=<jarkko@taitavasti.fi> to=<jarkko@taitavasti.fi> proto=ESMTP helo=<mail.rst.dk>

This mail is sent from a Windows server by an invoicing application. I should be able to send mail from external mail servers that indicate my email address as both a sender and a recipient. How can I setup postfix to accept mails sent this way? Will it do any harm?

Thank you for your support!