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Old 08-09-2008, 06:55 PM   #1
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550 5.0.0 Access denied when sending mail using sendmail


I have a newly setup send mail server. When I am sending mail from shell, I am getting Access denied error.

[root@apple mail]# mail -v
Subject: test

Cc: Connecting to [] via relay...
220 ESMTP Sendmail 8.13.1/8.13.1; Sat, 9 Aug 2008 19:49:03 -0400
>>> EHLO Hello localhost.localdomain [], pleased to meet you
>>> MAIL From:<>
550 5.0.0 Access denied
root... Using cached ESMTP connection to [] via relay...
>>> RSET
250 2.0.0 Reset state
>>> MAIL From:<>
550 5.0.0 Access denied
postmaster... Using cached ESMTP connection to [] via relay...
>>> RSET
250 2.0.0 Reset state
>>> MAIL From:<>
550 5.0.0 Access denied
Closing connection to []
>>> QUIT
221 2.0.0 closing connection

Could someone please help me

Thanks in advance.
Old 05-07-2011, 03:16 AM   #2
Registered: Aug 2005
Location: D.i.t.h.o, Texas
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You may have to configure sendmail to use your ISP's SMTP & POP relays, as your actual network is not trusted by gmail (if they trusted everyone's network, well, then anyone could send mail).
Old 05-07-2011, 10:58 AM   #3
Registered: Oct 2006
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Distribution: Slackware 14.0, 14.1, current
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To help you solve the problem we need more information. Before you try to send out email from your server you should have properly configured domain for your internet connection. Your SMTP server is checked by other public servers whether you are a valid sender or not.
For example if your server does not have a valid Reverse Domain Name (PTR) for your internet connection some servers may deny you.
In sendmail there is an access database where you can define whether the sender is allowed or not to send email to your local mailboxes (or relay somewhere). You can (for example) create entry in access like this:
*.br  REJECT
*.ru  REJECT
This will tell to all the connections from the domain .br or .ru - Access denied. You get the same answer from the server where you wanted to send your email. You should investigate why the server on the other side identified you as someone who should not be able to do this.
There are several reasons why you can get denied. Try to look into the maillog.
Try to check whether you have a valid PTR.
set type=PTR
Replace the with the public IP address of your internet connection.

Last edited by hua; 05-07-2011 at 11:05 AM.
Old 10-18-2012, 08:07 PM   #4
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Had this too, it was permissions

I had this too, hopefully my fix helps someone.

Check the /etc/hosts.allow and make sure you have this entry for the daemon:
sendmail: ALL


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