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: 21,651,745

Open Rate to comcast.net: 3,018,122 (13.9%)

Date range:
Display as:

Sent vs Opens for comcast.net

Date Sent Opens Open Rate
5/21/2022 17,389 1,974 0.0%
5/20/2022 21,009 3,879 0.0%
5/19/2022 25,038 5,060 0.0%
5/18/2022 26,586 4,829 0.0%
5/17/2022 25,873 7,030 0.0%
5/16/2022 23,120 4,079 0.0%
5/15/2022 11,384 1,747 0.0%
5/14/2022 18,196 3,106 0.0%
5/13/2022 26,018 4,658 0.0%
5/12/2022 22,424 4,167 0.0%
5/11/2022 34,553 4,951 0.0%
5/10/2022 24,861 4,172 0.0%
5/9/2022 30,243 4,841 0.0%
5/7/2022 14,750 2,369 0.0%
5/6/2022 20,095 3,460 0.0%
5/5/2022 23,643 4,326 0.0%
5/4/2022 29,386 5,293 0.0%
5/3/2022 22,981 4,999 0.0%
5/2/2022 24,003 4,714 0.0%
5/1/2022 11,450 2,493 0.0%
4/30/2022 11,018 2,128 0.0%
4/29/2022 17,413 4,381 0.0%
4/28/2022 23,541 5,672 0.0%
4/27/2022 29,303 6,736 0.0%
4/26/2022 18,458 4,263 0.0%
4/25/2022 25,542 5,836 0.0%
4/24/2022 15,398 2,612 0.0%
4/23/2022 14,597 2,386 0.0%
4/22/2022 26,118 4,830 0.0%
4/21/2022 24,354 4,915 0.0%

Blocks from comcast.net

No blocks during specified time frame

Bounces from comcast.net

Message Count
550 5.1.1 Not our Customer 5,405
550 4.2.0 Not our Customer 2,390
550 5.2.0 - Recipient unavailable 429
552 5.1.1 recipient rejected - extended quota violation 278
550 5.2.0 Not our Customer 171
550 5.1.1 recipient unallocated 160
550 4.2.0 recipient unallocated 66
450 4.2.0 - Recipient temporarily unavailable 64
452 4.1.1 user over quota 40
Email was deferred due to the following reason: 23
452 4.2.0 user over quota 18
550 5.1.10 Recipient not found by SMTP address lookup 10
534-5.7.9 Application-specific password required. 2
550 5.1.0 invalid sender domain. 2
550 5.2.0 recipient unallocated 2
5.1.0 - Unknown address error 550-'5.1.1 Not our Customer' 2
554 5.1.0 192.185.145.23 Comcast block for spam. Please see http://postmaster.comcast.net/smtp-error-codes.php#BL000000 1
421 4.1.0 192.185.86.53 Throttled - try again later. Please see http://postmaster.comcast.net/smtp-error-codes.php#RL000003 1
421 4.2.0 149.72.34.12 Throttled - try again later. Please see http://postmaster.comcast.net/smtp-error-codes.php#RL000001 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. 0.35250:CC010000, 1.36674, 1.61250, 1.45378, 1.44866B000000, 1.36674:A1000000, 1.61250, 1.45378, 1.44866, 1.36674, 1.61250, 1.45378, 1.44866, 1.36674, 1.61250, 1.45378, 1.44866, 16.55847:DD000000, 17.43559AE030000000000000000000000000000, 20.52176F42941B0070200A00067C, 20.50032F42948B171010F4010000, 0.35180A00093A, 255.23226D000000, 255.27962, 255.17082:DD 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. 0.35250:AA6A0000, 1.36674, 1.61250, 1.45378, 1.44866B000000, 1.36674:A1000000, 1.61250, 1.45378, 1.44866, 1.36674, 1.61250, 1.45378, 1.44866, 1.36674, 1.61250, 1.45378, 1.44866, 16.55847:DD000000, 17.43559A6030000000000000000000000000000, 20.52176F99940A00F01F03000136, 20.50032F99947A17F01F07000000, 0.35180E265, 255.23226, 255.27962, 255.17082:DD040000, 0. 1
421 4.1.0 192.185.125.73 Throttled - try again later. Please see http://postmaster.comcast.net/smtp-error-codes.php#RL000003 1
550 4.2.0 invalid sender domain. 1
554 5.4.14 Hop count exceeded - possible mail loop ATTR34 1
550 5.5.0 Requested action not taken: mailbox unavailable. 1
554 5.7.1 Mailbox has reached daily sending limits for this IP: 209.85.214.174 1
554 5.7.1 Mailbox has reached daily sending limits for this IP: 209.85.214.171 1
421 4.1.0 Try again later 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. 0.35250, 1.36674, 1.61250, 1.45378, 1.44866B000000, 1.36674:A1000000, 1.61250, 1.45378, 1.44866, 1.36674, 1.61250, 1.45378, 1.44866, 1.36674, 1.61250, 1.45378, 1.44866, 16.55847:DD000000, 17.43559AE030000000000000000000000000000, 20.52176F6B941200F01F03000136, 20.50032F6B948217F01F07000000, 0.35180E265, 255.23226, 255.27962, 255.17082:DD040000, 0.24929, 4. 1
550 #5.1.0 Address rejected. 1
550 5.7.133 authentication required; Delivery restriction check failed because the sender was not authenticated when sending to this group 1
452 5.2.0 user over quota 1
The email account that you tried to reach does not exist. Please try double-checking the recipient's email address for typos or unnecessary spaces. 1
554 5.7.1 Mailbox has reached daily sending limits for this IP: 209.85.216.48 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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