sendmail logs "possible SMTP attack: command=HELO/EHLO, count=3"
Issue
When trying to send multiple mails simultaneously, it fails to send all of them, logging the following error on the /var/log/maillog. It seems that it has an association with sendmail security. How can I ease this restriction?
possible SMTP attack: command=HELO/EHLO, count=3
Environment
- Red Hat Enterprise Linux
- sendmail
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