Could not connect to SMTP server, self-hosted on localhost - smtp4dev

I'm testing appwrite 1.4.13 with nextjs on localhost, for development test I have smtp4dev.

_APP_SMTP_HOST=localhost _APP_SMTP_PORT=25 _APP_SMTP_SECURE=false _APP_SMTP_USERNAME= _APP_SMTP_PASSWORD= _APP_SMS_PROVIDER=
....
$telnet localhost 25 Trying ::1... Connected to localhost. Escape character is '^]'. 220 smtp4dev smtp4dev ready

On appwrite console, settings smtp, I try config
Server host: localhost
user: test
passw: test

but not working.
Could not connect to SMTP server

Try with empty strings for the username and password

_APP_SMTP_HOST=localhost
_APP_SMTP_PORT=25
_APP_SMTP_SECURE=false
_APP_SMTP_USERNAME=""
_APP_SMTP_PASSWORD=""

but, the problem is on console, the fields user, passw are required... and not connect with localhost... https://ibb.co/x7sqmGf

Ohh
You'll need to change something

Is this a local or remote deployment?

You'll need to put the computer's internal IP
You'll get by running ifconfig in unix based systems

Then replace localhost with it, for example 172.24.0.1

is local development all in the same pc... https://ibb.co/bg71M0G