cURL and "Must match sender"

[sniper9191]

Hello!

I have setup Stalwart mail server, with LDAP authentication - everything works well.
I am using the server as an SMTP relay.

I enabled "Must match sender", and it works well when I use purpose-built tools such as PowerShell's Send-MailMessage cmdlet, or .NET's System.Net.Mail.MailMessage class.

With the above tools, whenever I authenticate to the server and try to get it to relay an email, it works when the from matches the email address of my LDAP user.

However, when I try to do this with cURL --url smtp://, the "Must match sender" does not seem to work correctly.

In my cURL command, the email address is specified using --mail-from [email protected]
I also include via --upload-file \msg.txt, the following -

From:<[email protected]>
To:<[email protected]>
Subject: Test Email
 
Test Email
Sent using cURL

However, when the email is sent with valid authentication, it prompts me 501 5.5.4 You are not allowed to send from this address.

I am sure, Stalwart's checks are correct (given that it works with PowerShell / .NET).

But could someone point out where I got it wrong, with the cURL command?

In the logs, I see -

TRACE Raw SMTP input received (smtp.raw-input) listenerId = "smtp", contents = "MAIL FROM:<[email protected]> SIZE=125\r\n"
DEBUG MAIL FROM unauthorized (smtp.mail-from-unauthorized) listenerId = "smtp", from = "[email protected]", details = ["[email protected]", "[email protected]", "smtp:[email protected]"]
TRACE Raw SMTP output sent (smtp.raw-output) listenerId = "smtp", contents = "501 5.5.4 You are not allowed to send from this address.\r\n"

I tried playing around with the msg.txt syntax, but none of the following options worked -

From:<[email protected]>
From:[email protected]
From:"My Name" <[email protected]>

[mdecimus]

Hi,

Perhaps you made a mistake when you redacted the logs?

DEBUG MAIL FROM unauthorized (smtp.mail-from-unauthorized) listenerId = "smtp", from = "[email protected]", details = ["[email protected]", "[email protected]", "smtp:[email protected]"]

This line does not make sense as [email protected] is the present in the details list.