Could not instantiate mail function to other domain wordpress

A common issue!

When you're trying to send emails from a WordPress site to another domain, you might encounter issues with instantiating the mail function. Here are some possible solutions:

  1. Check your WordPress configuration: Make sure that the wp_mail function is properly configured in your WordPress installation. You can do this by checking the wp-config.php file and ensuring that the WP_MAIL constant is set to true.
  2. Verify your email settings: Ensure that your email settings are correct in the WordPress admin dashboard. Go to Settings > General and check that the "Email Address" and "From Email" fields are set correctly. Also, make sure that the "From Name" field is set to a valid email address.
  3. Check your PHP mail settings: PHP has its own mail settings that might affect the wp_mail function. Check your PHP configuration file (php.ini) and ensure that the sendmail_path directive is set correctly. You can also try setting the mail function to use a specific SMTP server by setting the SMTP_HOST, SMTP_PORT, SMTP_USERNAME, and SMTP_PASSWORD constants in your wp-config.php file.
  4. Use a SMTP plugin: If you're using a SMTP plugin like WP Mail SMTP or Easy WP SMTP, ensure that it's properly configured and set to use the correct SMTP server and credentials.
  5. Check your domain's DNS settings: If you're trying to send emails to another domain, ensure that the DNS settings for that domain allow incoming emails. You might need to set up a mail exchanger (MX) record or a sender policy framework (SPF) record to allow emails to be sent from your domain.
  6. Use a third-party email service: If you're still having issues, consider using a third-party email service like Mailgun, Sendgrid, or Amazon SES to send emails from your WordPress site. These services provide a simple way to send emails and can help you avoid issues with your domain's DNS settings.

If none of these solutions work, please provide more details about your setup, including your WordPress version, PHP version, and any error messages you're seeing. I'll do my best to help you troubleshoot the issue!