On Thu, 20 Sep 2018, Michael Peddemors wrote:
Also helpful to quickly look at the reputation of your neighbours ;0
Check the reputation of all the IP(s) in the /24 against something like
MXToolbox or HetrixTools.
For instance, I don't think you want to get an IP in this range.. :)
[
Deleted reverse DNS lookup showing a bunch of dubious domains. Full
email is here:
https://chilli.nosignal.org/cgi-bin/mailman/private/mailop/2018-September/012700.html
]
So I guess some of the domains generated in the above email are so bad
they generated bounces from around 220 list members. The vast majority of
them were from gmail:
SMTP error from remote mail server after end of data:
host gmail-smtp-in.l.google.com [2a00:1450:400c:c0a::1a]:
550-5.7.1 This message does not have authentication information or fails to
pass
550-5.7.1 authentication checks. To best protect our users from spam, the
550-5.7.1 message has been blocked. Please visit
550-5.7.1 https://support.google.com/mail/answer/81126#authentication for
more
550 5.7.1 information. p16-v6si5907932wrv.246 - gsmtp
plus a couple of smaller providers.
TIL: mailchimp, mailerlite and a bunch of email sending providers
outsource their corporate email to gmail.
In short please avoid sending stuff to this list that may trigger spam
filters.
Simon.
The Moderator with LetEncrypt on his own domains.
--
Simon Lyall | Very Busy | Web: http://www.simonlyall.com/
"To stay awake all night adds a day to your life" - Stilgar
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