Who is MAILER-DAEMON and why is he mailing me?
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japan.internet.com recently reported on a survey with a slightly odd topic conducted by goo Research regarding receiving mail from MAILER-DAEMON. Just in case you are wondering what this is, legitimate replies from the legitimate MAILER-DEMON means that mail counldn’t be delivered, but often spam or viruses use fake MAILER-DEMON messages to try to get past filters.
Demographics
Between the 9th and 11th of March, 1,072 members of the goo Research monitor group successfully completed a private internet-based questionnaire. 51.8% of the sample were male, 25.3% in their twenties, 23.0% in their thirties, 22.4% in their forties, 21.4% in their fifties, and 8.0% in their sixties.
In Q1SQ3 about three in five read MAILER-DAEMON messages at least some of the time, yet it is one of the vectors of spam and viruses. Note that for some reason most Japanese MAILER-DAEMONs speak in English, and only very rarely does Japanese feature, even in my employer’s internal system, even though it seems like all you need to do is to provide a simple template file for the new error message, in the case of Postfix at least. Does it incorrectly handle Japanese and other double-byte characters, I wonder?
Research results
Q1: Have you ever received a mail from “MAILER-DAEMON”? (Sample size=1,072)
Yes (to SQs) 53.5% No 46.5% Q1SQ1: Do you know the meaning of “MAILER-DAEMON”? (Sample size=573)
Know it well 23.6% Know something about it 45.4% Don’t know it at all 31.1% Q1SQ2: What did you think the first time you received a mail from “MAILER-DAEMON”? (Sample size=573, multiple answer)
Votes Percentage Thought that mail I’d sent hadn’t been delivered 280 48.9% Thought it was spam 169 29.5% Felt surprised 157 27.4% Felt uneasy 152 26.5% Thought it was a message from a foreigner 81 14.1% Thought it was wrongly delivered 73 12.7% Didn’t really feel anything in particular 37 6.5% Other 9 1.6% Q1SQ3: Do you read the mail from “MAILER-DAEMON”? (Sample size=573)
Always read 18.2% Sometimes read 41.4% Never read 40.5% In addition, 74.2% thought it would be useful if MAILER-DAEMON messages were all in Japanese.