Noted That:

• To install correctly this global-smtp.zip .
• Fisrt Download the global-smtp.zip to your computer
• Extract/Open global-smtp.zip to Your Computer.
• Then, Find readme.txt file inside global-smtp.zip and Open readme.txt .
• Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
• Then, Follow the Tips Below.

Start the Tips:

1. First Download " global-smtp.zip " Plugin to your Local Computer. (Click Download)

2. Then, Login to your " yourdomain.com/wp-admin " Dashboard.

3. Then, Click on " Plugins " + " Add New " from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse " global-smtp.zip "  Downloaded plugin from your computer, Where you downloaded global-smtp.zip According to Step – 1 Above then, click on " Install Now"

6. Now, Click on " Active Plugin"

7. Then, See left sidemenu. " Global SMTP " folder is added on left sidemenu. Now, Click on " Global SMTP " folder.

   Noted that: If you do not see " Global SMTP " folder on left sidemenu then, see at left sidemenu " Settings " or " Tools ".

8. Now you configure yourself oR Watch video tutorial below about  Global SMTP Configurtions and Settings or How to work " Global SMTP " in your WordPress site.

After Activated Plugin According to Step-6 then,

1. Go to " Plugins " + " Installed Plugin " from Wordpress Admin Panel Leftside Menu.
2. or Direct go to: https://yourdomain/wp-admin/plugins.php
3. Then, Find " Global SMTP " Activated Plugin from Plugin List.
4. Then, Click on " Settings " from Plugin that is Global SMTP
5. Now, Edit/Add/Config the setting and Click on " Save Changes " button,

Quick Setup

1. Install the plugin, optionall as an mu plugin.
2. Visit ‘Settings > Global SMTP Setup’ in your dashboard.
3. Copy and paste the sample configuraiton to wp-config.php and update with your SMTP credentials.
4. (optional) Add additional statements to complete the configuration for your smtp server.

Available Constants

Required
GLOBAL_SMTP_HOST – The FQDN of the mail server (supplied by your SMTP provider)
GLOBAL_SMTP_USER – Username for accessing the mail server (most often your email address).
GLOBAL_SMTP_PASSWORD – Password to authenticate your email account.

Optional
GLOBAL_SMTP_FROM – Email address to use for outgoing mail. Uses WordPress defaults when not set. Many hosts will force this to be the same as the username.
GLOBAL_SMTP_FROM_NAME – Name set in the From header for outgoing mail. Uses WordPress defaults when not set.
GLOBAL_SMTP_PORT – Port number for SMTP connection. Assumed as 587 (for tls).
GLOBAL_SMTP_SECURE – Encryption type. Assumed to be ‘tls’. Can be ‘ssl’, ‘tls’, or ‘none’.
GLOBAL_SMTP_AUTH_TYPE – Authentication type. Defaults to ‘LOGIN’, can also be ‘PLAIN’ or ‘NTLM’.

GLOBAL_SMTP_RETURN_PATH - Address to send bounced emails.
GLOBAL_SMTP_REPLYTO_FROM - Email address shown in recipients mail client when clicking "Reply"
GLOBAL_SMTP_DISABLE - Set to true to prevent this plugin from hooking into `wp_mail`. This is useful for environment specific configurations.

Troubleshooting

For troubleshooting, we recommend that you install the check email plugin:
https://wordpress.org/plugins/check-email/

If you add this statement to wp-config.php you will see debug output when sending a test email via that plugin.

define('GLOBAL_SMTP_DEBUG',true);