Hello,
For the past few months, the administrators of our site have been receiving the mailing‑list emails we have used for several years on our shared hosting only very sporadically.
They are sent by the server of our site www.famidac.fr (running SPIP) to notify us of each article publication, member registration, etc. The list of recipients (moderators & administrators) has not changed in ages … and we only receive this automatic (standard) message very intermittently:
Hello! I am the ezmlm program. I manage the mailing list
mo...s@famidac.fr.
A number of messages from the mailing list
mo...s could not be delivered to you correctly. Attached you will find
a copy of the first bounce message that I received.
If the message you are reading now also fails to reach its destination,
a final message will be sent to you. If that one also fails,
your address will unfortunately be removed from the mo...s list.
I have kept a list of the messages from the mo...s mailing list that
could not be delivered to your address temporarily.
Here are the numbers of the messages in question: (...)
This issue has already been discussed (a long time ago) in other posts, concerning problems with Yahoo.fr – which is unrelated to us because all our moderators have a Gmail address.
Should we look for a solution on the OVH side or on the SPIP side?
Curiously, Étienne
Hello,
That’s where you should look first.
Hi @Etienne07,
As @fritz2cat mentioned, in that attachment you can see the SMTP error responses from the different providers, indicating the reason for the rejection. They can be of different types (IP blacklist, insufficient SPF, domain reputation issue...)
It is common that not all providers apply the same "checks" when they receive an email, so you need to try to review which providers have "rejected" the mail, understand why, and try to find a common cause.
From there, you could start to determine whether the problem lies with OVH or with some specific rule of the destination mail provider.
Thank you for your first feedback and advice!
Checks performed: the latest ezmlm mails notify us of errors coming from third‑party sender emails; example (excerpt):
550-5.7.26 Unauthenticated email from social.gouv.fr is not accepted due to
550-5.7.26 domain's DMARC policy. Please contact the administrator of
550-5.7.26 social.gouv.fr domain if this was a legitimate mail. To learn
about 550-5.7.26 the DMARC initiative, go to 550 5.7.26
https://support.google.com/mail/?p=DmarcRejection
Alright. However, what no longer works are the messages that our SPIP site used to send to our administrators’ mailing‑list for each article publication and validation request… and I have also discovered that “Some hosts disable automatic mail sending from their servers. In that case, this SPIP feature does not work.”
Is it possible that OVH blocked this feature a few months ago (because of spam from our mailing‑list or other reasons)? How can we reactivate it?
Curiously, Étienne
Hello,
In my opinion, ezmlm (at OVH) is misconfigured. The mailing list should set its own name as the sender of forwarded emails, and not retain the original sender.
Indeed, the ezmlm server at OVH is not authorized to send emails with a @social.gouv.fr sender address, and this policy was set by gouv.fr.
Groups.io does this perfectly well, and is free for small groups.
When user@example.com sends a message to the mailing list [test],
- the subject can be modified by the mailing list, for example by adding a tag [test] or something different from [test]
- the sender will be changed to From: user=example.com@groups.io
Thus, this email originating from a @groups.io user passes all SPF, DKIM, DMARC checks.
In conclusion, ask OVH to modify the ezmlm configuration (and please forward us the response in your future ticket).
If this is impossible for OVH (ezmlm is really an old piece of software, see https://en.wikipedia.org/wiki/Ezmlm), make the obvious decision: look elsewhere than OVH for your mailing lists.