I got below error message while sending alert as a email only to a particular saved search.
09-25-2017 06:00:45.331 -0400 ERROR ScriptRunner - stderr from '/opt/splunk/server/bin/python /opt/splunk/server/etc/apps/search/bin/sendemail.py "results_link=https://XXXXXXXXXXXXXX:8000/app/search/@go?sid=xxxxxxxxxxxx" "graceful=True" "trigger_time=1506333632" results_file="/opt/splunk/server/var/run/splunk/dispatch/sxxxxxx/results.csv.gz"': ERROR:root:(552, '5.3.4 Message size exceeds fixed limit', u'no-reply@xxxxxxx') while sending mail to: xxxxx.com;xxxxx.com;xxxxx.com; xxxx.com;xxxx.com
what is the message size limit and where to change the limit.
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[savedsearches.conf] action.email.maxresults =
These ones give a few more settings that may need to be updated...
i found the issue, splunk is triggering the alert properly. It got stuck in email gateway where size defined is 20MB. Attachment is exceeds over 20MB, so that alert triggered from splunk is getting blocked.