Entware Mailx installation

[deveals]

Hello and good day! Attempting to create performance monitoring scripts/reports and would like to forward output as a SMTP email attachment using MailX:
Code:
echo "Test email body text" | mailx -s "Test email subject" -a output.txt someone@gmail.com

Recieving the following error message:
Code:
/opt/sbin/sendmail: No such file or directory

Searched/located sendmail
Code:
find / -name sendmail
/usr/sbin/sendmail

As a test, I copied /usr/sbin/sendmail to /opt/sbin/sendmail .. SMTP email attempt failed again:
Code:
cp /usr/sbin/sendmail /opt/sbin/sendmail
echo "Test email body" | mailx -s "Test email subject" -a output.txt someone@gmail.com
send-mail: applet not found
rm /opt/sbin/sendmail

SMTP email test via amtm is successful; SMTP email test using basic sendmail is also successful but unable to specify subject, add body text, and attach file (all needed).

In advance, your consideration and suggestions are appreciated.

 

[ColinTaylor]

As mailx is looking for the Entware version of sendmail (postfix) it might be easiest if you just install that.

 

[deveals]

Hello! Prompt review and suggestion appreciated! As suggested, I installed postfix and located the following:
Code:
find / -name sendmail*
/tmp/mnt/sda/entware/sbin/sendmail.postfix

I retried the mailx command and the error continues ... should I try:
1. copying /tmp/mnt/sda/entware/sbin/sendmail.postfix to /opt/sbin/sendmail (know how)
2. linking /opt/sbin/sendmail to /tmp/mnt/sda/entware/sbin/sendmail.postfix (don't know and requires research)
3. something else