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Server: Apache
System: Linux a16-asgard6.hospedagemuolhost.com.br 5.14.0-570.52.1.el9_6.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Oct 15 06:39:08 EDT 2025 x86_64
User: maoristu4c3dbd03 (1436)
PHP: 8.1.33
Disabled: NONE
$ pwd: /lib/firewalld/services/
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File: //lib/firewalld/services/smtp-submission.xml
<?xml version="1.0" encoding="utf-8"?>
<service>
  <short>Mail (SMTP-Submission)</short>
  <description>SMTP-Submission allows remote users to submit mail over port 587.</description>
  <port protocol="tcp" port="587"/>
</service>
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