The program works perfectly. By accessing the program configuration file with filezilla usr/local/share/maltrail/mailtrail.conf I tried to change the default access password by doing this:
Terminal: echo -n 'password' | sha256sum | cut -d " " -f 1
generated key: 5e884898da28047151d0e56f8dc6292773603d0d6aabbdd62a11ef721d1542d8
Then I modified the file mailtrail.conf by leaving it like this:
USERS
admin:5e884898da28047151d0e56f8dc6292773603d0d6aabbdd62a11ef721d1542d8:0: # password
I've also modified the next parameter by leaving it like this:
USE_SERVER_UPDATE_TRAILS true
Source info: https://kifarunix.com/how-to-install-and-configure-maltrail-on-ubuntu-18-04/
After saving the changes and restarting opnsense neither of the two modifications have been saved.
Are you sure you hit save in General section?
Thanks a lot, it works. The strange thing is I didn't save the changes by accessing filezilla.