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Dynamic IP Ranges and Error Codes updated

 


 

 

What are Comcast's Outbound Mail Servers?

Outbound Mail Servers

Below are Comcast's outbound mail servers:

Host IP Address
resqmta-ch2-01v.sys.comcast.net 69.252.207.33
resqmta-ch2-02v.sys.comcast.net 69.252.207.34
resqmta-ch2-03v.sys.comcast.net 69.252.207.35
resqmta-ch2-04v.sys.comcast.net 69.252.207.36
resqmta-ch2-05v.sys.comcast.net 69.252.207.37
resqmta-ch2-06v.sys.comcast.net 69.252.207.38
resqmta-ch2-07v.sys.comcast.net 69.252.207.39
resqmta-ch2-08v.sys.comcast.net 69.252.207.40
resqmta-ch2-09v.sys.comcast.net 69.252.207.41
resqmta-ch2-10v.sys.comcast.net 69.252.207.42
resqmta-ch2-11v.sys.comcast.net 69.252.207.43
resqmta-ch2-12v.sys.comcast.net 69.252.207.44
resqmta-po-01v.sys.comcast.net 96.114.154.160
resqmta-po-02v.sys.comcast.net 96.114.154.161
resqmta-po-03v.sys.comcast.net 96.114.154.162
resqmta-po-04v.sys.comcast.net 96.114.154.163
resqmta-po-05v.sys.comcast.net 96.114.154.164
resqmta-po-06v.sys.comcast.net 96.114.154.165
resqmta-po-07v.sys.comcast.net 96.114.154.166
resqmta-po-08v.sys.comcast.net 96.114.154.167
resqmta-po-09v.sys.comcast.net 96.114.154.168
resqmta-po-10v.sys.comcast.net 96.114.154.169
resqmta-po-11v.sys.comcast.net 96.114.154.170
resqmta-po-12v.sys.comcast.net 96.114.154.171
qmta01-mdp2.westchester.pa.bo.comcast.net 69.252.76.7
qmta02-mdp2.westchester.pa.bo.comcast.net 69.252.76.8
qmta03-mdp2.westchester.pa.bo.comcast.net 69.252.76.9
qmta01-mdp.westchester.pa.bo.comcast.net 76.96.68.101
qmta02-mdp.westchester.pa.bo.comcast.net 76.96.68.102
qmta03-mdp.westchester.pa.bo.comcast.net 76.96.68.103
IPv6 Outbound CIDRs
2001:558:fe16:19::/64
2001:558:fe21:29::/64

Postmaster FAQs

This page was designed to address questions on the following topics:

All policies and thresholds on this page are subject to change. This site will be updated when such changes are implemented.