HEX
Server: Apache/2.4.18 (Ubuntu)
System: Linux phubuntu06.apexhosting.com 4.4.0-210-generic #242-Ubuntu SMP Fri Apr 16 09:57:56 UTC 2021 x86_64
User: master06 (1000)
PHP: 7.0.33-0ubuntu0.16.04.16
Disabled: pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,
$ pwd: /usr/share/webmin/postfix/help/
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File: //usr/share/webmin/postfix/help/opt_smtpd_helo_required.html
<header>HELO is required</header>

<center><tt>smtpd_helo_required</tt></center>
<hr>

This parameter optionally turns on the requirement that SMTP clients must
introduce themselves at the beginning of an SMTP session.

<hr>
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