SENT: 530 SMTP authentication is required to external receipient

[itsmesri]

I am trying to send email to external recipient using my hMail Server email address. I have written code in c#. Code also deployed IIS website where same server hmail server exists. So code and email server on the same server.

If I send to my hmailserver domain (I mean my domain) it works. Only if I am trying to send email external id using my smtp server. it is not working.

"SMTPD" 2956 5864 "2016-01-17 01:29:04.698" "192.168.1.254" "SENT: 220 Welcome message from SMTP"
"SMTPD" 2428 5864 "2016-01-17 01:29:04.700" "192.168.1.254" "RECEIVED: EHLO COWBOYS"
"SMTPD" 2428 5864 "2016-01-17 01:29:04.701" "192.168.1.254" "SENT: 250-[nl]250-SIZE 20480000[nl]250-AUTH LOGIN[nl]250 HELP"
"SMTPD" 2468 5864 "2016-01-17 01:29:04.703" "192.168.1.254" "RECEIVED: MAIL FROM:<fromemail@gmail.com>"
"SMTPD" 2468 5864 "2016-01-17 01:29:04.710" "192.168.1.254" "SENT: 250 OK"
"SMTPD" 2956 5864 "2016-01-17 01:29:04.712" "192.168.1.254" "RECEIVED: RCPT TO:<externalrecipient@externalrecipientdomain.com>"
"SMTPD" 2956 5864 "2016-01-17 01:29:04.713" "192.168.1.254" "SENT: 530 SMTP authentication is required."

Code: Select all

    SmtpClient client = new SmtpClient();
                //client.Send(oMail);
                client.Send(fromEmailId, toEmailId, subject, message);

Code: Select all

 <system.net>
        <mailSettings>
            <smtp>
                <network host="smtp.myhmaildomail.com" userName="info@myhmaildomain.com" password="password@123"  port="25" />
            </smtp>
        </mailSettings>
    </system.net>

[mattg]

You are sending FROM a gmail address

hMailsevrer correctly sees that as an external address, and so this is external to external

As the script is one the same server, you can change the IP range setting for localhost to allow external to external without SMTP auth.
Be aware that any hostile script on your machine (ie a Trojan) can then do the same.

Better if your code can authenticate with a local account, and send from a local domain, not gmail.

[jimimaseye]

also... unless you you are using GMail relays then you are likely to have problems (being seen as spam) anyway as sending from=@gmail from your own server will fail the gmail SPF and DKIM tests set by gmail.

[itsmesri]

I have already selected ip range for my ipaddress. Still it is not sending email see my settings

[jimimaseye]

I dont see a problem with misbehaviour. You have EXTERNAL TO EXTERNAL REQUIRES AUTHENTICATION set and your log shows
quote]"SMTPD" 2956 5864 "2016-01-17 01:29:04.712" "192.168.1.254" "RECEIVED: RCPT TO:<externalrecipient@externalrecipientdomain.com>""SMTPD" 2956 5864 "2016-01-17 01:29:04.713" "192.168.1.254" "SENT: 530 SMTP authentication is required."[/quote]

So it is working as configured. You need to tell your script to authenticate.

That is, of course, assuming that that screen shot is for for the IP RANGE incorporating 192.168.1.254. But we cant tell because for some reason you have blanked it out! (What's the point of a screenshot if you are going to blank out the important bits?)

[itsmesri]

It is not IP RANGE incorporating 192.168.1.254. It is External IP of router. I also have other IP rangers like "My Computer" LIP 127.0.0.1 to UIP 127.0.0.1 and "Internet" LIP 0.0.0.0 to UIP 255.255.255.255.

Do you want me to specify IP RANGE 192.168.1.254?

[itsmesri]

I added IP RANGE for 192.168.1.254. Still I am getting same error.

[jimimaseye]

Have you set your script to authenticate?? Have you set the IP RANGE to NOT authenticate for EXTERNAL to EXTERNAL? One or the other....

[mattg]

I added IP RANGE for 192.168.1.254

Please show a screen shot of that IP range

[itsmesri]

@mattg

[mattg]

And what does the check box on the bottom right say??

uncheck the checkbox on the bottom right, and then try again

[itsmesri]

Thanks @mattg.

It worked.

You said, "Be aware that any hostile script on your machine (ie a Trojan) can then do the same."

Is there anyway I can stop trojan not use this. I have already McAfee running machine.

If I use captcha on my website will stop this send emails?

[mattg]

also... unless you you are using GMail relays then you are likely to have problems (being seen as spam) anyway as sending from=@gmail from your own server will fail the gmail SPF and DKIM tests set by gmail.

It really is best to get your website to authenticate