sh: 1: /usr/sbin/sendmail: not found

[edbrk]

Hello,

Recently had some issues with cron. Turned on Error logging, and ran the cron manually. Recieved an error
sh: 1: /usr/sbin/sendmail: not found
When attempting to send the Domain Status Synchronisation and the Daily cron email digest. I wonder why i have never seen this emails.
Tried adding it to the PHP-FPM Docker file and rebuilding but no luck. Unsure please advise.

Thanks.

[EdyTheCow]

Weird, I've never had such an issue. Are the other crons working as they supposed to? Also, are you attempting to send emails directly from your server or are you using something like aws ses?

[edbrk]

Well in WHMCS we have SMTP Setup, Works fine for sending normal WHMCS emails. Just not the CRON ones.

The WHMCS cron runs fine, sending the emails is the last step which it errors out on. What other Crons?

[EdyTheCow]

Okay I see, I've never ended up using the daily cron emails which might be why I never came across this issue. By "other crons" I just meant if the crons were working at all, was just me not fully understanding the issue. I'll attempt to set this up on my own installation and see if I can solve it.

[edbrk]

Seems to be working on some of my installs but not on others! Strange.

[scop]

This error also still occurs on a fresh install when first going to the admin config area and entering invalid credentials (it tries to send an email about that login attempt).