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Apps | Demo | Docs | Install

When using catch-all for email, how to „turn off“ one address?

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  • necrevistonnezrN Offline
    necrevistonnezrN Offline
    necrevistonnezr
    wrote on last edited by girish
    #1

    I use catch-all in email settings basically for creating arbitrary addresses for certain websites (e.g. as supported in Bitwarden).

    One address under my domain (that I never created) receives like 90 % of all spam. Can I turn off such an address under these circumstances?

    I read into Spamassassin rules, but I believe when blacklisting (e.g. byblacklist_to foo@domain.com), it will only marked as spam. I would like to not even reach any inbox but just get rejected…

    timconsidineT 1 Reply Last reply
    0
  • timconsidineT Offline
    timconsidineT Offline
    timconsidine App Dev
    replied to necrevistonnezr on last edited by
    #2

    @necrevistonnezr make a sieve rule to reject incoming to that address ?

    necrevistonnezrN 1 Reply Last reply
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  • robiR Offline
    robiR Offline
    robi
    wrote on last edited by
    #3

    I wonder if a reject all mailbox can be configured, which can then have added aliases.

    Life of sky tech

    1 Reply Last reply
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  • necrevistonnezrN Offline
    necrevistonnezrN Offline
    necrevistonnezr
    replied to timconsidine on last edited by
    #4

    @timconsidine
    Thanks. I don't see a "reject" rule in Roundcube, but a "discard with message" - I assume that's the same?
    And are those sieve rules processed before or after the spam filter?

    timconsidineT 1 Reply Last reply
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  • timconsidineT Offline
    timconsidineT Offline
    timconsidine App Dev
    replied to necrevistonnezr on last edited by timconsidine
    #5

    @necrevistonnezr not sure about Roundcube as I moved over to SnappyMail, but I think it is similar.
    Under Filters you can add a sieve script (maybe they call it 'custom')

    And yes I think discard with message is equivalent. But not an expert.

    Due to the excellent spamassassin rules posted here https://forum.cloudron.io/post/30512 by @d19dotca, I am not needing to use sieve in SnappyMail. But here is the script which I use in Protonmail. The from can be changed to to I guess.

    NB : I put the reject part of the rule before the spam test. Arguably I should have a return after the reject - not sure why I did not do that.

    require ["include", "environment", "variables", "relational", "comparator-i;ascii-numeric", "spamtest", "reject", "fileinto", "imap4flags"];
    
    if address :contains "from" ["spammer@blah.co.uk",  "spammer.com"]
    {
      reject "Spam";
    }
    
    if spamtest :value "ge" :comparator "i;ascii-numeric" "5" {
        fileinto "spam";
    }
    
    if exists "list-unsubscribe"
    {
        addflag "\\List";
    }
    
    # Generated: Do not run this script on spam messages
    if allof (environment :matches "vnd.proton.spam-threshold" "*",
    spamtest :value "ge" :comparator "i;ascii-numeric" "${1}")
    {
        return;
    }
    
    
    1 Reply Last reply
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