The error 452 is always reported when you build php and smtp services on the windows-server-win platform.

The server is windowserver2008 and php needs to send emails, so the smtp mail server built by myself always has the 452 error outofmemory. Is it a memory problem? Is there any other way for a third party to build an smtp server like google or sina? Easy to figure...

The server is window server 2008 and php needs to send emails. Therefore, the self-built smtp Mail server Always produces the 452 error.
Out of memory, is it a memory problem?
Is there any other way for a third party to build an smtp server like google or sina?
The figure is convenient. I use the php built-in mail () function. What's the problem? I only sent a few emails, and there is always a 452 error.

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The server is window server 2008 and php needs to send emails. Therefore, the self-built smtp Mail server Always produces the 452 error.
Out of memory, is it a memory problem?
Is there any other way for a third party to build an smtp server like google or sina?
The figure is convenient. I use the php built-in mail () function. What's the problem? I only sent a few emails, and there is always a 452 error.

The behavior of the email function is affected by php. ini.
Have you configured php. ini?