My colleague was unexpectedly booted from the Code4Lib list and received
the message below. She uses a work Gmail account so it doesn't seem
especially likely to be misconfigured. I didn't realize there were any
additional requirements for the new listserv, I wonder if this is affecting
Any thoughts on how to fix this?
* * *
You have been automatically removed from the CODE4LIB list (Code for
Libraries) as a result of repeated delivery error reports from your mail
system. This decision was based on the list's automatic error monitoring
policy and has not been reviewed or otherwise confirmed by a person. If
you receive this message, then it means that something is wrong. While
you are obviously able to receive mail, your mail system has been
regularly reporting that your account did not exist, or that you were
otherwise permanently unable to receive mail. Here is some information
that may assist you or your local help desk in determining the cause of
- The failing address is [redacted]
- The first error was reported on 2016-09-08.
- Since then, a total of 3 delivery errors have been received.
- The last reported error was: 5.7.1 550-5.7.1
[2600:3c03::f03c:91ff:fe55:a961] Our system has detected that this
550-5.7.1 message does not meet IPv6 sending guidelines regarding PTR
records 550-5.7.1 and authentication. Please review 550-5.7.1
https://support.google.com/mail/?p=IPv6AuthError for more information 550
5.7.1 . s67... (24 bytes suppressed)
Please do not ignore this message. While you can re-subscribe to the
list, it is important for you to report this problem to your mail
administrator so that it can be solved. This problem is not specific to
the CODE4LIB list and may also affect your private mail. This means that
you may have lost some private mail as well. Anyone trying to write to
you during the same time frame might have received the same errors for
the same reason.