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  • Published Question

    Can't Send Emails Using Both Postfix & Sendmail On Debian-9-64bit Fresh Droplet

    There's a problem with either the DigitalOcean firewalls or something similar. Can't send emails using both Postfix and Sendmail. I've put no firewalls in place. All ports open, but still can't send. Please fix ASAP. ...
    1 By praneethcodes Email Applications Conceptual DigitalOcean Cloud Firewalls Firewall Messaging Debian