org.apache.james.transport.mailets.remote.delivery.MailDelivrer.doDeliver:163

 Setting up a mail server using james today was not successful.

I made changes to the configuration file:

1: domainlist.xml:
<domainlist class="org.apache.james.domainlist.jpa.JPADomainList">
<autodetect>false</autodetect>
<autodetectIP>false</autodetectIP>
<defaultDomain>1688club.com</defaultDomain>
</domainlist>

2: mailetcontainer.xml:
<context>
<!-- When the domain part of the postmaster mailAddress is missing, the default domain is appended.
You can configure it to (for example) <postmaster>postmaster@myDomain.com</postmaster> -->
<postmaster>postmaster@1688club.com</postmaster>
</context>

None of the tests were successful. When sending messages, I always tried to connect to the other party's port 25, but could not connect. After testing for a long time, there was still no effective solution. When sending emails via smtp, it always prompted: org.apache.james .transport.mailets.remote.delivery.MailDelivrer.doDeliver:163
We have to find a way to continue to solve this problem