Deliverability to comcast.net

Emails Sent to comcast.net: 9,075,806

Open Rate to comcast.net: 1,281,480 (14.1%)

Date range:
Display as:

Sent vs Opens for comcast.net

Date Sent Opens Open Rate
8/11/2020 12,888 1,801 0.0%
8/10/2020 14,990 2,399 0.0%
8/9/2020 8,576 1,206 0.0%
8/8/2020 12,429 1,396 0.0%
8/7/2020 19,208 2,456 0.0%
8/6/2020 23,030 2,551 0.0%
8/5/2020 18,672 3,016 0.0%
8/4/2020 16,811 2,481 0.0%
8/3/2020 16,252 2,437 0.0%
8/2/2020 11,799 1,434 0.0%
8/1/2020 10,864 1,245 0.0%
7/30/2020 17,864 2,660 0.0%
7/29/2020 19,173 2,585 0.0%
7/28/2020 21,447 3,159 0.0%
7/27/2020 18,173 2,596 0.0%
7/26/2020 12,970 1,266 0.0%
7/25/2020 11,477 1,507 0.0%
7/24/2020 19,045 2,765 0.0%
7/23/2020 24,038 2,826 0.0%
7/22/2020 19,465 2,616 0.0%
7/21/2020 18,485 2,641 0.0%
7/20/2020 58,542 2,747 0.0%
7/19/2020 8,289 1,152 0.0%
7/18/2020 10,859 1,401 0.0%
7/17/2020 16,522 2,238 0.0%
7/16/2020 25,288 2,861 0.0%
7/15/2020 34,734 2,775 0.0%
7/14/2020 25,317 3,206 0.0%
7/13/2020 18,490 2,730 0.0%
7/12/2020 11,325 1,814 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 4,898
554 5.1.0 167.89.100.248 Comcast block for spam. Please see http://postmaster.comcast.net/smtp-error-codes.php#BL000000 1,335
554 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 606
550 4.2.0 Not our Customer 192
550 5.2.0 - Recipient unavailable 141
550 5.1.1 recipient unallocated 90
552 5.1.1 recipient rejected - extended quota violation 63
450 4.2.0 - Recipient temporarily unavailable 52
SMTP; 550 5.1.1 Not our Customer 27
554 resimta-po-29v.sys.comcast.net resimta-po-29v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 27
554 resimta-po-11v.sys.comcast.net resimta-po-11v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 23
554 resimta-po-05v.sys.comcast.net resimta-po-05v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 22
554 resimta-po-13v.sys.comcast.net resimta-po-13v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 21
554 resimta-po-12v.sys.comcast.net resimta-po-12v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 20
554 resimta-po-21v.sys.comcast.net resimta-po-21v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 20
554 resimta-po-34v.sys.comcast.net resimta-po-34v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 19
554 resimta-po-24v.sys.comcast.net resimta-po-24v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 19
554 resimta-po-06v.sys.comcast.net resimta-po-06v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 19
554 resimta-po-01v.sys.comcast.net resimta-po-01v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 18
554 resimta-po-26v.sys.comcast.net resimta-po-26v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 18
554 resimta-po-20v.sys.comcast.net resimta-po-20v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 17
554 resimta-po-15v.sys.comcast.net resimta-po-15v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 17
554 resimta-po-37v.sys.comcast.net resimta-po-37v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 17
554 resimta-po-32v.sys.comcast.net resimta-po-32v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 17
554 resimta-po-17v.sys.comcast.net resimta-po-17v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 16
554 resimta-po-08v.sys.comcast.net resimta-po-08v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 16
554 resimta-po-09v.sys.comcast.net resimta-po-09v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 16
554 resimta-po-14v.sys.comcast.net resimta-po-14v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 16
554 resimta-po-02v.sys.comcast.net resimta-po-02v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 16
554 resimta-po-25v.sys.comcast.net resimta-po-25v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 15
554 resimta-po-22v.sys.comcast.net resimta-po-22v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 15
554 resimta-po-18v.sys.comcast.net resimta-po-18v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 15
554 resimta-po-16v.sys.comcast.net resimta-po-16v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 15
554 resimta-po-36v.sys.comcast.net resimta-po-36v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 15
554 resimta-po-07v.sys.comcast.net resimta-po-07v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 15
554 resimta-po-19v.sys.comcast.net resimta-po-19v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 15
554 resimta-po-40v.sys.comcast.net resimta-po-40v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 14
550 5.2.0 Not our Customer 14
554 resimta-po-39v.sys.comcast.net resimta-po-39v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 14
554 resimta-po-30v.sys.comcast.net resimta-po-30v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 14
554 resimta-po-27v.sys.comcast.net resimta-po-27v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 13
554 resimta-po-10v.sys.comcast.net resimta-po-10v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 13
554 resimta-po-35v.sys.comcast.net resimta-po-35v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 13
554 resimta-po-33v.sys.comcast.net resimta-po-33v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 13
554 resimta-po-04v.sys.comcast.net resimta-po-04v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 12
554 resimta-po-28v.sys.comcast.net resimta-po-28v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 12
554 resimta-po-38v.sys.comcast.net resimta-po-38v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 12
554 resimta-po-23v.sys.comcast.net resimta-po-23v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 11
554 resimta-po-31v.sys.comcast.net resimta-po-31v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 10
554 resimta-po-03v.sys.comcast.net resimta-po-03v.sys.comcast.net 50.31.63.254 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 10
452 4.1.1 user over quota 9
550 5.4.6 Unusual sending activity detected. Please try after sometime. 5
550 4.2.0 recipient unallocated 4
535 Authentication failed: Bad username / password 3
554 resimta-po-21v.sys.comcast.net resimta-po-21v.sys.comcast.net 168.245.22.86 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL000010 2
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. 2
554 5.7.1 Mailbox has reached daily sending limits for this IP: 209.85.166.181 2
550 5.1.10 Recipient not found by SMTP address lookup 2
550 5.7.133 authentication required; Delivery restriction check failed because the sender was not authenticated when sending to this group 2
554 delivery error: dd Not a valid recipient - 2
SMTP; 550 5.1.1 recipient unallocated 2
554 198.54.115.221 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 2
554 5.7.1 Mailbox has reached daily sending limits for this IP: 209.85.166.49 1
535 5.7.0 Too many bad auth attempts. 1
554 5.7.1 Mailbox has reached daily sending limits for this IP: 209.85.166.177 1
554 5.7.1 Mailbox has reached daily sending limits for this IP: 209.85.166.41 1
554 168.245.114.95 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL000110 1
554 5.7.1 Mailbox has reached daily sending limits for this IP: 209.85.166.46 1
550 5.5.0 Requested action not taken: mailbox unavailable. 1
554 resimta-po-35v.sys.comcast.net resimta-po-35v.sys.comcast.net 198.54.115.221 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 1
554 167.89.106.58 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL000001 1
552 5.2.2 Quota exceeded 1
452 4.2.0 user over quota 1
DNS Error. DNS type 'mx' lookup responded with code NXDOMAIN 1
554 Reject by content spam 1
SMTP; 550 5.1.1 ... User unknown 1
554 5.7.1 Mailbox has reached daily sending limits for this IP: 209.85.166.173 1
554 167.89.100.226 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL000100 1
421 4.1.0 192.185.24.15 Throttled - try again later. Please see http://postmaster.comcast.net/smtp-error-codes.php#RL000003 1
550 5.1.1 not found 1
554 resimta-po-09v.sys.comcast.net resimta-po-09v.sys.comcast.net 168.245.22.86 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL000010 1
554 5.7.1 Mailbox has reached daily sending limits for this IP: 209.85.166.175 1
X-Postfix; delivery temporarily suspended: host mx2.comcast.net refused to talk to me: 554 192.185.86.53 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 1
550 5.4.5 Daily user sending quota exceeded. - gsmtp 1
TLS Negotiation failed, the certificate doesn't match the host. 1
535 5.7.8 Error: authentication failed: 1
550-5.7.1 Our system has detected that this message is 550-5.7.1 likely suspicious due to the very low reputation of the sending 550-5.7.1 domain. To best protect our users from spam, the message has been 550-5.7.1 blocked. Please visit 550 5.7.1 https://support.google.com/mail/answer/188131 1
X-Postfix; delivery temporarily suspended: host mx2.comcast.net refused to talk to me: 554 192.185.127.3 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 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.