Laravel - Connection could not be established with host smtp.gmail.com - linux

Question

I've tried all the possible solutions available here in stackoverflow, however nothing... I think the problem is related to the firewall, I can send mail using SMTP gmail on my local machine, but not in my server, I get the following message:
Connection could not be established with host smtp.gmail.com [Connection timed out #110]
I've tried the following commands:
ufw allow 587/tcp
iptables -I OUTPUT -p tcp --dport 587 -j DROP
iptables -I OUTPUT -d smtp.gmail.com -p tcp -m tcp --dport 587 -j ACCEPT
iptables -L OUTPUT -n
However not worked...
This is my .env email settings:
MAIL_DRIVER=smtp
MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
MAIL_USERNAME=*****#gmail.com
MAIL_PASSWORD=*****
MAIL_ENCRYPTION=tls
My controller for sending emails:
public function postEmail(PostEmailRequest $request)
{
if ($request){
Mail::send('app.pages.contato.email', $request->all(), function($message) use ($request)
{
$message->from($request->email , config('settings.website_title'));
$message->to(config('settings.admin_email'))->subject($request->assunto);
});
return redirect('contato');
}else{
return redirect('contato')->withErrors($request);
}
}

Answer 1

I sent a ticket to Digital ocean and that is the obtained answer:
Hello!
To curb a recent increase in abuse and SPAM, we have an initial SMTP block on new accounts created in certain contexts.
To remove that block we'd like to do some manual account verification.
Please let us know the following:
Your Name
Location
Phone Number
The reason you are requesting the removal of the SMTP block
Also, please provide as many of the following as you can to help us verify your identity:
Your public Twitter handle
Your blog
Your company or personal website
Your public Facebook profile
We take SPAM very seriously as we comply fully with the CAN-SPAM Act. If you're not familiar, this says that you may not send bulk email unless you maintain a double-authorized list of subscribed members including IP addresses and relevant contact information. Also, you must follow guidelines for including removal links with all sent emails according to the CAN-SPAM Act.
If you have any questions we're happy to help answer them for you.
Regards,
DigitalOcean Support
Edit
I replied with the information that was requested and now everything works perfectly =)

Answer 2

Have you tried the following:
.env:
MAIL_DRIVER=smtp
MAIL_HOST=smtp.gmail.com
MAIL_PORT=465
MAIL_USERNAME=username#example.com
MAIL_PASSWORD=pass
and mail.php:
'encryption' => 'ssl',

Answer 3

You need to enable access for less secure applications google
https://www.google.com/settings/security/lesssecureapps

Answer 4

First of all check in gmail account if it allow to send email less secure apps.
https://support.google.com/accounts/answer/6010255?hl=en

Answer 5

Try to activate your account app password
https://accounts.google.com/b/0/DisplayUnlockCaptcha
To learn more: https://accounts.google.com/UnlockCaptcha

Answer 6

I had similar issue with my laravel 5.3 app. My error was with self signed certificate on server. Solution here - https://stackoverflow.com/a/41267848
add to your config/mail.php this code somewhere
'stream' => [
'ssl' => [
'allow_self_signed' => true,
'verify_peer' => false,
'verify_peer_name' => false,
],
],