The most common reason for not being able to send or receive emails is your antivirus/security software or firewall restricting Mailbird’s access

There could be several reasons why you are unable to send and receive emails.

  • Port 25 closed – This port must be open to send and receive emails. Contact your hosting provider.
  • Mail Client configured incorrectly – to check your mail client configuration.
  • SPF/DKIM configured incorrectly – To update your SPF/DKIM settings,
  • Exim queue full – To clear your queue or delete specific messages.
  • DNS-related issue – Use the Email deliverability in Cpanel interface to identify problems with your mail-related DNS records for one or more of your domains.

By peter

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