![]() If a signature contains an image pointing to a resource that cannot be accessed, the message will not send. Select on the appropriate row (labeled something like under "Site".Postbox > Preferences (macOS) or Options (Windows) > Security > Passwords > Saved Passwords.Uncheck the option to Use Secure Authentication and then restart Postbox.Įnsure that there are no trailing spaces, as this can cause you to fail to authenticate.ĥ) Try deleting the password associated with SMTP server in the password manager. ![]() Go to Accounts -> Outgoing Server (SMTP)" (at the bottom of the left pane-you may need to scroll down), select your SMTP Server and click the Edit button. Go to Accounts -> Outgoing Server (SMTP)" (at the bottom of the left pane-you may need to scroll down), and double-check server name, port, and other settings.ģ) You receive an error while sending that says your server does not support secure authentication (SMTP-AUTH). In some cases, it guesses the wrong values. When creating mail accounts, Postbox will attempt to automatically determine Outgoing server (SMTP) settings. If you are having difficulty sending mail, please try these troubleshooting steps:ġ) Verify that your firewall or antivirus program is not blocking Postbox.Ģ) Double check that your Outgoing server (SMTP) settings correct and match your ISPs recommended settings. ![]()
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