Relay Local Sender Error

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ibrahimayhangto
Posts: 5
Joined: Fri Jan 08, 2021 5:42 pm

Relay Local Sender Error

Post by ibrahimayhangto » Fri Jan 08, 2021 5:45 pm

Hello,
I use MailEnable Professional in our building, but there is a problem like this

After Providing SMTP Authendication with the system@posta.com Account
It has been observed that e-mail can be sent to test2@mail.com by using the address test1@mail.com,

I Analyzed The Situation By Disabling The "Delivery Using Mail Address" Option On A Different Platform,

But How Can I Do This Operation On MailEnable?
I expect information from you, good work ...

MailEnable-Ian
Site Admin
Posts: 9325
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: Relay Local Sender Error

Post by MailEnable-Ian » Mon Feb 01, 2021 12:54 am

Hi,

Not sure I fully understand what your trying to configure. Are you trying to prevent sender address spoofing?
Regards,

Ian Margarone
MailEnable Support

ibrahimayhangto
Posts: 5
Joined: Fri Jan 08, 2021 5:42 pm

Re: Relay Local Sender Error

Post by ibrahimayhangto » Mon Feb 01, 2021 3:13 am

MailEnable-Ian wrote:
Mon Feb 01, 2021 12:54 am
Hi,

Not sure I fully understand what your trying to configure. Are you trying to prevent sender address spoofing?

Yes, I Checked Required Settings On SMTP Services As Explained On The Forums But Sender Fraud Continues

MailEnable-Ian
Site Admin
Posts: 9325
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: Relay Local Sender Error

Post by MailEnable-Ian » Mon Feb 01, 2021 3:28 am

Hi,

Can you elaborate on the security settings you have enabled within the SMTP Security settings.
Regards,

Ian Margarone
MailEnable Support

ibrahimayhangto
Posts: 5
Joined: Fri Jan 08, 2021 5:42 pm

Re: Relay Local Sender Error

Post by ibrahimayhangto » Mon Feb 01, 2021 3:41 am

MailEnable-Ian wrote:
Mon Feb 01, 2021 3:28 am
Hi,

Can you elaborate on the security settings you have enabled within the SMTP Security settings.
My Settings in Security and Relay Section This Way As I Show In The Picture, But The Problem Of Sending Mail On Test2 Using Test1 Address Continues.

Image

Image

MailEnable-Ian
Site Admin
Posts: 9325
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: Relay Local Sender Error

Post by MailEnable-Ian » Mon Feb 01, 2021 4:32 am

Hi,

To prevent sender address spoofing you need to enable the option "Authenticated senders can spoof the sender address" under the SMTP "Address Spoofing" option.
Regards,

Ian Margarone
MailEnable Support

ibrahimayhangto
Posts: 5
Joined: Fri Jan 08, 2021 5:42 pm

Re: Relay Local Sender Error

Post by ibrahimayhangto » Mon Feb 01, 2021 5:38 am

MailEnable-Ian wrote:
Mon Feb 01, 2021 4:32 am
Hi,

To prevent sender address spoofing you need to enable the option "Authenticated senders can spoof the sender address" under the SMTP "Address Spoofing" option.
I Restarted the Process You Specified Applications and Services,
The Problem Only Persists,

Image

I'm Testing This With The Application Below

Image

MailEnable-Ian
Site Admin
Posts: 9325
Joined: Mon Mar 22, 2004 4:44 am
Location: Melbourne, Victoria, Australia

Re: Relay Local Sender Error

Post by MailEnable-Ian » Mon Feb 01, 2021 6:06 am

Hi,

When I telnet to your server and try to send from a local address from within your code it prevents me from doing so unless I authenticate and therefore the security option is working. please test results below:
220 Wellcome to GTO Mail Server
ehlo there
250-gto.org.tr [x.x.x.x], this server offers 4 extensions
250-AUTH LOGIN
250-SIZE 20480000
250-HELP
250 AUTH=LOGIN
mail from:<mustafasert@gto.org.tr>
551 This mail server requires authentication before sending mail from a locally hosted domain. Please reconfigure your mail client to authenticate before sending mail.
If your application is running on the same server as the mail server then it will consider the IP as being local and bypass the security check for address spoofing. You need to test remotely.
Regards,

Ian Margarone
MailEnable Support

ibrahimayhangto
Posts: 5
Joined: Fri Jan 08, 2021 5:42 pm

Re: Relay Local Sender Error

Post by ibrahimayhangto » Mon Feb 01, 2021 6:21 am

MailEnable-Ian wrote:
Mon Feb 01, 2021 6:06 am
Hi,

When I telnet to your server and try to send from a local address from within your code it prevents me from doing so unless I authenticate and therefore the security option is working. please test results below:
220 Wellcome to GTO Mail Server
ehlo there
250-gto.org.tr [x.x.x.x], this server offers 4 extensions
250-AUTH LOGIN
250-SIZE 20480000
250-HELP
250 AUTH=LOGIN
mail from:<mustafasert@gto.org.tr>
551 This mail server requires authentication before sending mail from a locally hosted domain. Please reconfigure your mail client to authenticate before sending mail.
If your application is running on the same server as the mail server then it will consider the IP as being local and bypass the security check for address spoofing. You need to test remotely.
Thank You For Your Support,
It has been determined that the application and the mail server are on the same platform.

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