Spam Resource Newsletter

Tucows / OpenSRS Infrastructure Changes

[ moo ]

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.

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