Hi William,

Thank you for replying to my question.

We hosted more than 600 lists and they are highly diversified.  Four lists have more than 5,000 subscribers.  Our main mail server is behind a spam firewall, but not the Listserv.  Implement a SPF hard fail might block some legitimate posters where their mail server did not have any SPF in their DNS.

Best,

Shinn
________________________________
From: LISTSERV Site Administrators' Forum <[log in to unmask]> on behalf of Brown, William <[log in to unmask]>
Sent: Thursday, March 9, 2023 8:28 AM
To: [log in to unmask] <[log in to unmask]>
Subject: Re: Block key words?


We have run Listserv (Windows) behind a spam filter for many years.  We receive notifications of all spam to the lists which has not be bad.  We have approximately 50 lists with max several hundred subscribers and only one or two get much spam.  Our lists are closed with subscriber approval which may help too.



If nothing else, have the spam filters check SPF to prevent spoofing and skip any rules based detection.



--

William Brown

WNYRIC/Erie 1 BOCES





From: LISTSERV Site Administrators' Forum <[log in to unmask]> On Behalf Of Shinn Wu
Sent: Thursday, March 9, 2023 11:08 AM
To: [log in to unmask]
Subject: Block key words?



******** This email originated from outside of the organization. Use caution when replying, opening attachment(s), and/or clicking on URL's. ********



Hello,



We use Listserv 17.0 in RedHat.  We had three incidents of 'phantom approval' this year and I had to ask the not aware editors to change the webmail settings.



I tried to use procmailrc to block the keywords.  It worked on the regular account on the same server but not the listserv account.  I thought that it might be aliases take precedence of procmailrc.  We do not want to use a spam filter because it would cause some false-positive.  Any insight suggestion to block some keywords (e.g., bitcoin, BTC wallet, and BTC address) from incoming post request?



Thank you,



Shinn



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