Hi MailOps! We wanted to let you know that Intuit Mailchimp will be adding new sending IPs which were previously unused.
We've been sending from the following ranges historically: 148.105.8.0/21 198.2.128.0/18 205.201.128.0/20 We own all of 148.105.0.0/16 and will be utilizing more of those IPs moving forward; mail volume will be ramped up gradually over time. For the near term, these are the specific new CIDRs we expect to use. We'll send additional notifications in advance of adding any additional ranges. 148.105.0.0/24 148.105.1.0/24 148.105.4.0/24 148.105.16.0/24 148.105.128.0/24 148.105.129.0/24 148.105.255.0/24 IP hostname/rDNS naming convention will be very similar to existing IPs. Samples of existing hostnames: - mail103.atl18.mcdlv.net - mail105.atl111.rsgsv.net - mail106.atl91.mcsv.net Samples of new hostnames: - mail45.use201ppd.mcdlv.net (staging/test MTA, should be very, very low volume) - mail108.use2001.mcdlv.net - mail22.usw2002.mcdlv.net Our existing sending IP hostnames won't change, and no other changes to our sending domains or authentication use are planned at this time. ——— Matt Gilbert Senior Deliverability Engineer Intuit Mailchimp _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
