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User: aglcoke (1118)
PHP: 8.2.31
Disabled: mail,exec,system,passthru,shell_exec,proc_close,proc_open,dl,popen,show_source,posix_kill,posix_mkfifo,posix_getpwuid,posix_setpgid,posix_setsid,posix_setuid,posix_setgid,posix_seteuid,posix_setegid,posix_uname
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File: //usr/share/doc/esmtp/mutt-esmtp
/home/<user>/.muttrc:
--- snipp ---
# Default sendmail call
set sendmail="/usr/bin/esmtp"
set envelope_from=yes
--- snapp ---


Give .esmtprc only the permissions 600!
/home/<user>/.esmtprc:
--- snipp ---
# Configuration file for ESMTP.

# Set SMTP host and service (port)
hostname = SMTPSERVER:25

# Set the user name
username = "USERNAME"

# Set the password
password = "PASSWORD"

# Use the Starttls
starttls = disabled
--- snapp ---