Deliverability to comcast.net
Comcast is a multimedia giant with roots in music, film, television, and, you guessed it, email, and telecommunications. Comcast launched its online communications platform in 2008. Users can access their Comcast.net email and voice services via an integrated hub dubbed Xfinity Connect.

Emails Sent to comcast.net: 42,986,993

Open Rate to comcast.net: 7,159,267 (16.7%)

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Sent vs Opens for comcast.net

Date Sent Opens Open Rate
1/25/20256,20276412.3%
1/24/20258,6241,71619.8%
1/18/20257,0521,05514.9%
1/17/20259,2701,87020.1%
1/16/202510,1592,12320.8%
1/15/202510,2772,38223.1%
1/14/202511,0703,06527.6%
1/13/20259,3911,74518.5%
1/12/20254,44683918.8%
1/11/20255,56497517.5%
1/10/202511,1122,29020.6%
1/9/202511,5962,37120.4%
1/8/20259,0122,03822.6%
1/7/20258,8031,99022.6%
1/6/20259,4842,13922.5%
1/4/20254,88363012.9%
1/3/20258,2211,38216.8%
1/2/20259,3711,66117.7%
1/1/20254,69680117%
12/31/20247,0531,40519.9%
12/30/202410,8792,72725%
12/29/20244,49258813%
12/28/20247,5291,50820%
12/27/20248,2661,43517.3%
12/26/20246,5071,15717.7%
12/25/20244,96279716%
12/24/20247,8901,48418.8%
12/23/20249,1931,71018.6%
12/22/20246,28395015.1%
12/21/20245,54890416.2%

Blocks from comcast.net

No blocks during specified time frame

Bounces from comcast.net

Explanation of bounce codes

Message Count
550 5.1.1 Not our Customer 5,608
550 5.2.0 - Account Closed, Please Remove 279
552 5.1.1 recipient rejected - extended quota violation 220
550 5.1.1 recipient unallocated 140
550 5.2.0 Not our Customer 61
550 4.2.0 Not our Customer 50
452 4.1.1 user over quota 32
450 4.2.0 - Recipient Temporarily Unavailable, Please Try Again Later 15
550 5.1.8 Access denied, bad outbound sender AS 6
552 1 Requested mail action aborted, mailbox not found 3
550-5.1.1 The email account that you tried to reach does not exist. Please try 550-5.1.1 double-checking the recipient's email address for typos or 550-5.1.1 unnecessary spaces. For more information, go to 550 5.1.1 https://support.google.com/mail/?p=NoSuchUser 3
554 5.2.2 mailbox full; Failed to process message due to a permanent exception with message The process failed to get the correct properties. 1.84300, 1.84300F000000, 1.84300:A1000000, 1.84300, 1.84300, 0.117068, 1.79180, 1.79180F000000, 1.79180:FA000000, 0.73100, 5.95292F526F7073006E, 8.111356F5F19C9441AE441A6536B31ED2F214BA6536B31, 0.38698:A6536B31, 1.41134, 7.36354, 1.41134, 7.36354DE60900, 0.34102A159B, 5.29818D333739322D626163652D303030302D30303030303030303030303000383A50, 5.55446A30003A393 2
550 5.5.0 Requested action not taken: mailbox unavailable . 2
554 51.195.131.66 found on one or more DNSBLs, see https://postmaster.comcast.net/smtp-error-codes.php#BL000010 2
550 5.7.520 Access denied, Your organization does not allow external forwarding. Please contact your administrator for further assistance. AS 1
550 4.2.0 recipient unallocated 1
550 5.4.1 Recipient address rejected: Access denied. 1
452 4.1.1 too many recent messages; Try again later 1
550 5.1.10 Recipient not found by SMTP address lookup 1
DNS Error. DNS type 'mx' lookup responded with code NXDOMAIN 1
452 4.2.0 user over quota 1
554 5.2.2 mailbox full; Failed to process message due to a permanent exception with message The process failed to get the correct properties. 1.84300, 1.84300F000000, 1.84300:A1000000, 1.84300, 1.84300, 0.117068, 1.79180, 1.79180F000000, 1.79180:FA000000, 0.73100, 5.95292C006E, 8.111356F5F19C9441AE441A6536B31ED2F214BA6536B31, 0.38698:A6536B31, 1.41134, 7.36354, 1.41134, 7.36354E000100, 0.34102A284276, 5.29818D633839392D663166372D303030302D303030303030303030303030008F5000, 5.55446A300046000000, 7 1
554 5.2.2 mailbox full; Failed to process message due to a permanent exception with message The process failed to get the correct properties. 1.84300, 1.84300F000000, 1.84300:A1000000, 1.84300, 1.84300, 0.117068, 1.79180, 1.79180F000000, 1.79180:FA000000, 0.73100, 5.95292, 8.111356F5F19C9441AE441A6536B31ED2F214BA6536B31, 0.38698F5F19C9, 1.41134, 7.36354FA4A0, 1.41134, 7.36354A0FC6, 0.34102A159B, 5.29818D323335642D386234312D303030302D30303030303030303030303000536B31, 5.55446A300000000000, 7.29828 1
554 5.2.2 mailbox full; Failed to process message due to a permanent exception with message The process failed to get the correct properties. 1.84300, 1.84300F000000, 1.84300:A1000000, 1.84300, 1.84300, 0.117068, 1.79180, 1.79180F000000, 1.79180:FA000000, 0.73100, 5.95292E, 8.111356F5F19C9441AE441A6536B31ED2F214BA6536B31, 0.38698F5F19C9, 1.41134, 7.36354, 1.41134, 7.36354A0FC6, 0.34102A159B, 5.29818D323335642D386234312D303030302D303030303030303030303030002E3833, 5.55446A300032334D42, 7.29828EA01 1

Methodology

Send and open statistics are updated daily. Bounces and blocks are updated in real-time. Every day, open statistics are updated for the last 14 days. Generally, you'll notice an increase of an open rate for a domain for a day over the course of 14 days, since not all open events occur the same day an email is sent. That means that open rate data is tied to the actual emails sent on a particular day.

Bounce and block codes are the codes as returned by the remote SMTP server after having been de-personalized. Meaning, unique identifiers present in SMTP codes are removed so that SMTP responses can be grouped for analysis. In certain cases, such as when the email is being relayed through an intermediary SMTP server, the remote SMTP server may not be the same as the MX record for the domain. SMTP codes are categorized as "bounces" vs "blocks" by internal human review. Bounces generally indicate an invalid email address. Blocks generally indicate a rejection of the email message but a valid email address.

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