Per notification on the Mailop mailing list on November 24, 2021, "Tucows / OpenSRS is executing an upgrade that will result in new SMTP outbound IP addresses being used within the next couple weeks.
All outbound email for regular and "filter-only" delivery:
64.98.42.0/24
64.99.140.1/24
216.40.44.0/24
All outbound forward and autoresponder traffic:
64.98.36.17/32 forward.b.hostedemail.com
64.99.140.10/32 fo-relay.a.hostedemail.com
216.40.42.17/32 forward.a.hostedemail.com"
My understanding is that these changes will apply to any domains with MX records pointing at *.hostedemail.com infrastructure. These are email customers of Tucows/OpenSRS as covered here.
Per notification on the Mailop mailing list on November 24, 2021, "Tucows / OpenSRS is executing an upgrade that will result in new SMTP outbound IP addresses being used within the next couple weeks.
All outbound email for regular and "filter-only" delivery:
All outbound forward and autoresponder traffic:
My understanding is that these changes will apply to any domains with MX records pointing at *.hostedemail.com infrastructure. These are email customers of Tucows/OpenSRS as covered here.
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