Reply all results in error in incoming email log

[pl804]

When replying all to sender and list email alias, incoming email log shows the following error:

Error
Email::Receiver::AutoGeneratedEmailError
Happens when the 'precedence' header is set to: list, junk, bulk or auto_reply, or when any other header contains: auto-submitted, auto-replied or auto-generated.

Email, however, does get processed by Discourse, i.e., post appears in the topic thread.