Is there an echo in here, or is it just me?
The past few days, I've been getting multiple copies of e-mails from various apparently-unrelated sources, from small specialty businesses up to Tektronix.
Are they all using the same mailing-list software, or the same e-mail distribution service, and there's some new bug in the software? (Or, wait. Some of it's from lists. Some of it is order status updates, addressed specifically and only to me.)
Or is it something my server is doing wrong, that results in the sending server thinking that a message was temporarily rejected when in fact it was accepted?
I glance at the server log in search of enlightenment, and find the log to be unusable due to zillions of entries reporting failed logins; apparently the 'net is once again infested with very persistent bots trying random account names and passwords on random mail servers.
Restarting the mail server doesn't seem to have affected it.
I suppose one of these days I could turn off the SMTP server for a few hours when I'm not expecting any urgent messages; maybe the hackbots would go away for a while. (Doing this once in a while can also reduce spam, as the spam servers tend to mark destinations as dead if there's no response, while legitimate servers will hold the messages, retrying occasionally, for quite some time.)
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