Use ASPEMAIL to send mail through MDaemon's SMTP - the recipient unknown method is used to configure a Mail Server for the server. I use MDaemon 7.2.5 because this version has a free registration machine.
At first, I used the web program I originally wrote for Cdont and used ASPEMAIL to send emails. However, I could not send emails through the current MDaemon. It prompted the error message 550***@***.com recipient unknown.
After that, I checked the information and compared it with my own writing. The program found that the value of the From attribute in ASPEMAIL must be the email address registered in the Mail server. Further, I found that as long as you set the From attribute to a legal email address that has been registered in the mail server, even if you do not use the username and password parameters, the email can be sent successfully through aspemail. In other words, mdaemon only verifies the email address. No password verification is performed.
My test environment: 2000 Advanced server+iis+aspemail+mdaemon 7.2.5
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Relevant information found