J Doe skrev den 2017-09-27 19:49:
I recently configured Postfix 3.1.0 on a low-volume, Internet facing server. Mail operations are normal, but I had two questions regarding backscatter.
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1. From what I understand, “backscatter” refers to e-mails such as non-delivery reports being sent back to the originator of a spam message. As the originator is often a forged address, the non-delivery reports is essentially junk data. Would this be a correct definition for the term ?
non delivery is not correct, if you have a local sender that try to send email outside your own local domains it would create a bounce if it could not be delivered, this is not spam btw
2. Is it possible to white-list the generation of non-delivery reports for some hosts and prevent generation for all others ? For instance, if a Gmail user attempts to e-mail me but specifies a non-existent address, I want the non-delivery report to go them (and any other senders from @gmail.com), but all other reports should be stopped from being sent.
keep away from whitelists, since there is nothing to whitelist, but make sure your postfix does not accept and later bounce same mail since that could be with forged sender addresses
its always safe to reject all the best
