Failed to close email transport for account – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch is unable to close the email transport for a specific account. This could be due to a network issue, a misconfiguration in the email settings, or a problem with the email server itself. To resolve this issue, you can try the following: 1) Check the network connection and ensure it’s stable. 2) Review the email settings in Elasticsearch and correct any errors. 3) Check the status of the email server and ensure it’s functioning properly. 4) If the problem persists, consider restarting Elasticsearch.

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This guide will help you check for common problems that cause the log ” failed to close email transport for account [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “failed to close email transport for account [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            transport.sendMessage(message; message.getAllRecipients());
        } finally {
            try {
            } catch (MessagingException me) {
                logger.error("failed to close email transport for account [{}]";;
            if (contextClassLoader != null) {


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