[HN Gopher] Tell HN: Mailgun disabled our domain without notice
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       Tell HN: Mailgun disabled our domain without notice
        
       Quick backstory: We've used Mailgun for email delivery since ~2014.
       Sent hundreds of thousands of emails in that time. No mailing
       lists, all user provided emails (account creations, receipts,
       password resets, confirmation emails) etc. We're on the 'pay per
       use' plan. Average > 98.5 % delivery rate. We average maybe 1000
       emails per day.  Suddenly without prior notice we get an email:
       "Your account xxx has been temporarily disabled". Total blackout of
       all our email delivery.  Takes multiples emails and support ticket
       to get re-instated. Apparently we went above some "complaint rate
       threshold is 0.05% or lower" threshold, ad boom auto-disable. We
       now think (but guessing) our own users were complaining about
       contact form message spam getting through (as it seems google v2
       recaptcha is easily spammed these days).  Not faulting MG for
       having spam protections in place, that's great. One one think after
       being a client for nearly a decade of clean email sending, you'd at
       least get a notice about unusual activity before a blanked account
       deactivation.  /rant  Any alternatives folks have had good
       relations/practice with?
        
       Author : wilsmex
       Score  : 11 points
       Date   : 2021-04-28 21:35 UTC (1 hours ago)
        
       | mtmail wrote:
       | https://postmarkapp.com/ warned us a 0.1% complaint rate. A stern
       | warning. "For transactional email spam complaints should not
       | exceed 10 complaints in 10,000 emails sent and we're seeing much
       | higher in your activity. This is an expectation that many ISPs
       | have set, which we work very hard to uphold. "
       | 
       | We now use their API to forward any complaint to us to
       | doublecheck, we became paranoid to keep the number lower.
       | 
       | We're very happy with postmarkapp.
       | 
       | Somebody was using random IPs, but real email addresses to
       | signup. We don't know why, it never led to pageviews later. Maybe
       | it was an attempt to check which user (email address) clicks the
       | link in the confirmation email of a service they haven't signed
       | up for. I can understand if such users click 'this is spam' which
       | then gets reported back by the big email providers to
       | postmarkapp.
        
         | wilsmex wrote:
         | Thanks for info here. Definitely will look into them. I'll also
         | have to look into if MG has some webhook for complaints, as
         | we're also now suddenly super paranoid about that metric.
        
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       (page generated 2021-04-28 23:02 UTC)