On Premise - SMTP server is unable to send outbound emailsIssue SMTP sender is unable to send emails. Email records get inserted but their state changes from "send-ready" to "ignored" Troubleshooting steps to verify issue: Trigger an OOTB notification so that it creates an email that went from the state of send-ready to ignored Email diagnostics are stating that the custom mail server is working as expectedTest connection against the SMTP mail server, it shows successfulRun "ping/traceroute" commands against the mail server to see if there is any packet loss.Review the logs at the time of the ignored email, it states that the SMTP sender Job was completed.Set the port number to 25 on the SMTP server page, test the connection and it was successful however the email is ignoredConfirm if sending the email works when running a command on the mail serverReleaseAll releasesCauseIt's likely that these email plugins are not installed: -com.glide.email_client-com.glide.email_address_filter-com.glide.email_attachmentResolutionCheck that those plugins are installed: -com.glide.email_client-com.glide.email_address_filter-com.glide.email_attachment If they are not, they should be installed. Related LinksNOTE: Install the plugin(s) on a non production instance initially.