How to Install SMTP Mailing Queue Plugin, Manually
Upload the files to the /wp-content/plugins/smtp-mailing-queue/ directory
Activate the “SMTP Mailing Queue” plugin through the “Plugins” admin page in WordPress
Go to “SMTP Mailing Queue” settings page in WordPress admin settings section (you can simply click the “Settings” link for this plugin in the “Plugin” page
SMTP
Enter the SMTP credentials you got from your mail provider.
Common mail providers:
gmail
Host: smtp.gmail.com
Port: 465
Encryption: ssl
Use authentication: yes
Username: your full email address
yahoo
Host: smtp.mail.yahoo.com
Port: 465
Encryption: ssl
Use authentication: yes
Username: your full email address
office365
Host: smtp.office365.com
Port: 587
Encryption: tls
Use authentication: yes
Username: your full email address
If you have another mail provider you will most likely get the SMTP settings on their website or by asking them.
Advanced
queue limit: Set the amount of mails sent per cronjob processing
secret key: Set a key needed to start queue manually or via cronjob
don’t use wp_cron: Use a real cronjob instead of wp_cron. Call http://www.example.org?smqProcessQueue&key=MySecretKey in cronjob to start processing queue.
wp_cron interval: Choose how often wp_cron is started (in seconds)
Additional
For apache a .htaccess file with deny from all is generated in mail storage dir. For all systems that cannot read .htaccess you should deny access to wp-content/uploads/smtp-mailing-queue/.
Usage
After activation mails automatically queue to be processed by wp_cron or cronjob. SMTP will be used if settings set up.
Tools:
Test Mail: Test your email settings by sendig directly or adding test mail into queue.
Process Queue: Start queue processing manually. Your set queue limit will still be obeyed, if set.
List Queue: Show all mails in mailing queue.
Video
Screenshots
Plugin Not Working?
If any errors or problems with the plug-in then write comments.
