Thank you for your input folks. Already got microsoft to remove us from list.
What is best practice with own senders IP adresses? Go for a subnet or are individual single IPs fine as well? Cheers Stefan -----Ursprüngliche Nachricht----- Von: Al Iverson via mailop <[email protected]> Gesendet: Donnerstag 20 September 2018 16:55 An: mailop <[email protected]> Betreff: Re: [mailop] Best practice - running small outgoing only mailservice / network /ip-addresses Microsoft front-line sender support has a bit of a reputation for providing incorrect or inscrutable replies. Many people generally deal with this by replying to their response and politely challenging them to do what you initially asked them to do. I suggest that you do that. You may have to do this more than once. Best regards, Al Iverson On Thu, Sep 20, 2018 at 2:56 AM Stefan Bauer <[email protected]> wrote: > > Dear Users, > > we're running a small outgoing only mailservice for our customers from two > /32 ip-addresses. Hosted in different data centers in germany. > > So far we have good reputation and non of our mails have been blocked. > Recently, we get in trouble with hotmail because they seem to have blocked > parts / ranges from our carriers network. > > Sep 20 08:20:02 german/smtp[21745]: 61E255FB77: to=<[email protected]>, > relay=hotmail-com.olc.protection.outlook.com[104.47.40.33]:25, delay=0.76, > delays=0.08/0.01/0.51/0.16, dsn=5.7.1, status=bounced (host > hotmail-com.olc.protection.outlook.com[104.47.40.33] said: 550 5.7.1 > Unfortunately, messages from [188.68.39.254] weren't sent. Please contact > your Internet service provider since part of their network is on our block > list (S3150). You can also refer your provider to > http://mail.live.com/mail/troubleshooting.aspx#errors. > [CO1NAM03FT057.eop-NAM03.prod.protection.outlook.com] (in reply to MAIL FROM > command)) > > I'm aware of the delisting process but currently only get following response > from MS: > > 188.68.39.254 > 178.254.23.77 > > Note: Errors are unlikely, however, if an error is indicated, please resubmit > the specific IP or IP range. I dont get it... > > What is best practice to avoid that kind of blocks here - also for the > future? Is it better to get an own network segment like /28 (but thats > something we do not want to maintain tbh.) > > Thank you. > > Stefan > > _______________________________________________ > mailop mailing list > [email protected] > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop -- al iverson // 312-725-0130 // miami http://www.aliverson.com http://www.spamresource.com _______________________________________________ mailop mailing list [email protected] https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
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