diamuxin
Occasional Visitor
sendmail is standard as part of busybox...nothing special in the fork.
One thing I found is that the mail servers I was using to send the mail would complain when using a custom 'name' for the sender (maybe a spam/security check). Try setting the sender 'name' to be the same as your sending email address instead of something like Asus Router
I have already answered before: Everything solved, it was a problem with my Gmail account (from). I have created a new account and now everything works fine.
Thanks!