how do i stop sending all emails?

Hari So then what about registration. also it can be easily done by setting it to logs and breaking some flarum function by touching source.

or
You can simply set up a cron job to delete it for you easily.

Hari no need to edit core for this

OK then set up cron job to clear log in every 1 hour or maybe every 1 day or maybe every 1 month

Like this

* * * * *  find  /ramesh/cloud/web/flarum5/storage/logs/*.log -mtime +7 -exec rm -f {} \;

Make sure to change /ramesh/cloud/web/flarum5 to your flarum directory.

Hari so all outgoing mails will not goto log and wil not go through right? since did not configure mailgun

But It will log error in storage/logs

Hari when it's set back to smtp or mail driver.

No it will not do that, It will just save logs.

Hari i have (mod) participated in a discussion and a user posted something and i received an email notification even its not yet approved. i thought it was supposed to send emails when a post is approved. i don't know how it's working.

If you have "Automatically follow discussions that I reply to" enabled in your preferences, that could be why you still got the email notification of an unapproved post. The post exists, it's just that it's hidden pending approval but can still possibly count as an event. That makes me wonder if a normal user without any Admin permissions still gets an email notification if a discussion they reply to has a post pending approval doubtful nonetheless but I haven't really tested that theory.

I know an approach I recommended on another forum powered by Flarum has helped tremendously with not hitting their email quota so quickly. The local extender code disables all user preferences that pertain to email notifications when a new user registers. In hindsight, I can share this code if needed

The local extender does not disable password reset emails, unfortunately.

clarkwinkelmann unless you also have a process to manually enable the users or you have an extension taking care of that

Fortunately, we do hehe https://discuss.flarum.org/d/6485-email-verification-switch

streaps I would love to try your local extender.

This should take care of some of the notifications

<?php

/*
 * This file is part of Flarum.
 *
 * For detailed copyright and license information, please view the
 * LICENSE file that was distributed with this source code.
 */

use Flarum\User\Event\Registered;
use Flarum\User\User;
use Flarum\Extend;

return [
    (new Extend\Event)
        ->listen(Registered::class, function (Registered $event) {
            foreach ([
                'postMentioned',
                'userMentioned',
                'newPost',
                'newDiscussionInTag',
                'newPostInTag',
                'newDiscussionTag',
                'discussionCreated',
                'postUnapproved',
                'userCreated'
            ] as $key) {
                $event->user->setPreference(
                    User::getNotificationPreferenceKey("{$key}", 'email'),
                    false
                );
            }
            $event->user->setPreference('followAfterReply', false);

            $event->user->save();
        })
];

You should be able to add more to the array if you know the serialized type for the notification in question.