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Mail server restarts with signal 6 at regular intervals

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Article ID: 163319

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Updated On:

Products

Messaging Gateway

Issue/Introduction

In some configurations, the Messaging Gateway (SMG) mail server process (MTA) may exit with a signal 6 and restart. If alerts are configured this will generate one or more admin alert messages.

 

Alert email
Subject: mta crashed on signal 6 on [mail host name]

mta crashed on signal 6 on [mail host name]
exit code: 0x0086

Resolution

Workaround:

Disable DKIM validation via "Spam > Sender Authentication > DKIM > Enable DomainKeys Identified Mail (DKIM) validation for all incoming mail" and monitor the affected system. This may stop or reduce the frequency with which the process restarts.