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I have a script on my server that automatically answers incoming messages. This is realized with procmail. I want to write a follow-up after e.g. 24 or 48 hours. Is there a way i can realize this - best would be with procmail and/or postfix, since i am already using it.

  • Without any hints about what your current code looks like, are you looking for anything more that "probably yes"? – tripleee Jan 11 '17 at 16:09
  • I do not think my current code is relevant in any way. It is a standard procmail expression. What i am looking for is either a flag to postfix '-delay_for_ms XXX' or '-do_not_send_before YYY' or some kind of ' delayed pipe | ' where i can pipe my new mail into. – Heiner Jan 11 '17 at 20:53
  • Have you considered using at for delayed execution? – AnFi Jan 11 '17 at 23:18
  • No, i do not know at. 'man at' gives no result on my system. Can you give me a hint? – Heiner Jan 11 '17 at 23:41
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echo 'echo "xxx"|mail recipient@domain.tld' | at now + 1 min

Suggested by Andrzej A. Filip this works like a charm. Thanks!

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  • This is more or less what I would have suggested too, but the problem now is queue management. How do you keep track of which at jobs are going to which addresses, in case you want to cancel one? – tripleee Jan 12 '17 at 5:08

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