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Topic: sender not logged in

==== Required information ====
- iRedMail version: 0.8.4
- 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: mail.log
====
I have this in my mail logs. What is the cause of this? and how can I fix this?

Aug 13 07:46:56 mail postfix/smtpd[16201]: connect from beach.emc.com.ph[76.74.155.18]
Aug 13 07:46:57 mail postfix/smtpd[16201]: NOQUEUE: reject: RCPT from beach.emc.com.ph[76.74.155.18]: 553 5.7.1 <gary@mydomain.net>: Sender address rejected: not logged in; from=<gary@mydomain.net> to=<gary@mydomain.net> proto=ESMTP helo=<beach.emc.com.ph>
Aug 13 07:46:57 mail postfix/smtpd[16201]: disconnect from beach.emc.com.ph[76.74.155.18]
Aug 13 07:46:57 mail postfix/smtpd[16201]: connect from beach.emc.com.ph[76.74.155.18]
Aug 13 07:46:58 mail postfix/smtpd[16201]: 3B6E37F97D: client=beach.emc.com.ph[76.74.155.18]
Aug 13 07:46:59 mail postfix/cleanup[16261]: 3B6E37F97D: message-id=<20130812234657.35C4068247604@beach.emc.com.ph>
Aug 13 07:46:59 mail postfix/qmgr[461]: 3B6E37F97D: from=<>, size=3901, nrcpt=1 (queue active)
Aug 13 07:46:59 mail postfix/smtpd[16201]: disconnect from beach.emc.com.ph[76.74.155.18]

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Re: sender not logged in

Please configure your mail client to enable SMTP auth for sending email.

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Re: sender not logged in

But this email came from clients. We don't have control over their mail clients.
What are the real world consequences if I removed this from the postfix main.cf?

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Re: sender not logged in

nerdtron09 wrote:

But this email came from clients. We don't have control over their mail clients.
What are the real world consequences if I removed this from the postfix main.cf?

Why they use your email address as "Sender"? If it's not permitted by you, then it's spam.