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

I hope this information is helpful for anybody doing any special processing for these mail flows.

Best regards

-lem


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