#2772 new defect

Gmail Classifying TWN Emails as Spam

Reported by: marlowe Owned by:
Priority: normal Milestone: undecided
Component: operational Version: 1.11.0
Keywords: Cc:
Launchpad Bug:


Multiple users have reported gmail tagging TWN emails as spam. The following was provided by an affected user

"*Authentication & Identification *

To ensure that Gmail can identify you:

  • Use a consistent IP address to send bulk mail.
  • Keep valid reverse DNS records for the IP address(es) from which you send mail, pointing to your domain.
  • Use the same address in the 'From:' header on every bulk mail you send.

We also recommend the following:

Learn more <https://support.google.com/mail/answer/180707> about email authentication."

Change History (4)

comment:1 Changed at 2016-04-07T16:26:53Z by marlowe

SPF record appears in order.

"Received-SPF: pass (antagonism.org: SPF record at tahoe-lafs.org designates as permitted sender)" and "SPF_HELO_PASS" from SpamAssassin?

As does reverse DNS,

"nslookup Server: Address:

Non-authoritative answer: name = tahoe-lafs.org."

We do not do DKIM. We should look into this.

comment:2 Changed at 2016-04-07T16:39:43Z by marlowe

If we implement option_from_is_list and DKIM signing as recommended here, http://serverfault.com/questions/340584/mailman-from-spoofing, this should resolve all the criteria listed above.

comment:3 Changed at 2016-04-07T18:15:57Z by warner

We should also look at the trac mailing lists: I think the root cause here might be spammy ticket/comments (which were then mailed to subscribers of tahoe-lafs-trac-stream). We seem to have fixed the comment spam problem for now, but our IP probably got a bad reputation while those messages were going out.

Zooko told me he's seeing spam sent to tahoe-dev-owner, which then gets forwarded to him and a few other people who admin/moderate that list.

comment:4 Changed at 2016-04-08T17:08:58Z by marlowe


Let's set up a time next week where we can work on this together.

Cheers, Patrick

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