Deliverability to comcast.net

Emails Sent to comcast.net: 6,927,372

Open Rate to comcast.net: 977,348 (14.1%)

Date range:
Display as:

Sent vs Opens for comcast.net

Date Sent Opens Open Rate
3/25/2020 11,608 1,448 0.0%
3/24/2020 15,458 2,133 0.0%
3/23/2020 16,909 2,549 0.0%
3/22/2020 10,713 1,379 0.0%
3/21/2020 13,371 1,793 0.0%
3/20/2020 16,774 2,577 0.0%
3/19/2020 18,602 2,828 0.0%
3/18/2020 18,034 2,745 0.0%
3/17/2020 19,047 2,881 0.0%
3/16/2020 16,153 2,531 0.0%
3/15/2020 8,077 1,117 0.0%
3/14/2020 8,596 1,522 0.0%
3/13/2020 17,052 2,360 0.0%
3/12/2020 15,324 2,110 0.0%
3/11/2020 12,963 1,875 0.0%
3/10/2020 14,116 1,823 0.0%
3/9/2020 13,013 2,015 0.0%
3/8/2020 6,615 802 0.0%
3/7/2020 11,403 1,132 0.0%
3/6/2020 17,090 1,728 0.0%
3/5/2020 15,366 2,035 0.0%
3/4/2020 18,536 2,341 0.0%
3/3/2020 16,489 2,205 0.0%
3/2/2020 17,082 2,188 0.0%
3/1/2020 7,038 696 0.0%
2/29/2020 13,149 1,089 0.0%
2/28/2020 18,577 1,773 0.0%
2/27/2020 17,518 1,790 0.0%
2/26/2020 18,278 2,538 0.0%
2/25/2020 16,049 2,064 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 3,327
550 4.2.0 Not our Customer 205
550 5.1.1 recipient mailbox unallocated 59
450 4.2.0 - Recipient temporarily unavailable 36
552 5.1.1 recipient rejected - extended quota violation 33
550 5.2.0 - Recipient unavailable 33
Message queue continuously deferred for too long. See https://sendgrid.com/docs/glossary/throttling/#what-causes-a-deferral 25
554 168.245.22.86 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL000010 22
535 5.7.0 Too many bad auth attempts. 17
452 4.1.1 user over quota 15
550 5.2.0 Not our Customer 6
SMTP; 550 5.1.1 Not our Customer 6
exceeded: mail rejected from sender 550 . 5
554 resimta-po-32v.sys.comcast.net resimta-po-32v.sys.comcast.net 168.245.22.86 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL000010 3
550 4.2.0 recipient mailbox unallocated 3
550 5.4.6 : Recipient address rejected: Email Sending Quota Exceeded 3
554 resimta-po-40v.sys.comcast.net resimta-po-40v.sys.comcast.net 168.245.22.86 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL000010 3
535 Incorrect authentication data 2
534-5.7.9 Please log in with your web browser and then try again. 2
554 resimta-po-19v.sys.comcast.net resimta-po-19v.sys.comcast.net 168.245.22.86 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL000010 2
The recipient server did not accept our requests to connect. 2
SMTP; 550 Host unknown 2
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 1
421 error proxying data: recv: read tcp 168.245.22.86->68.87.20.5: read: connection timed out 1
554 resimta-po-05v.sys.comcast.net resimta-po-05v.sys.comcast.net 168.245.120.135 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 1
554 168.245.120.135 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 1
rejected. /209.85.217.54 authenticated as already sent 400 messages for the last hour. The SMTP for this hosting account will be restored in 1 hour. See 550 http://www.siteground.com/terms.htm 1
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. 1
554 5.2.2 mailbox full; Failed to process message due to a permanent exception with message Cannot get ID from name. 0.35250A00D684, 1.36674, 1.61250, 1.45378, 1.44866, 1.36674, 1.61250, 1.45378, 1.44866, 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:EC100000, 16.55847:C6070000, 17.43559, 20.52176FFE8A1900F01F1F000000, 20.50032FFE8A8917F01F12000000, 0.35180, 255.23226, 255.27962, 255.27962, 255.17082:DD040000, 0.24929A6 1
554 5.4.14 Hop count exceeded - possible mail loop ATTR34 1
550 5.1.0 invalid sender domain. 1
554 resimta-po-04v.sys.comcast.net resimta-po-04v.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 resimta-po-07v.sys.comcast.net resimta-po-07v.sys.comcast.net 168.245.120.135 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL001000 1
554 resimta-po-24v.sys.comcast.net resimta-po-24v.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 resimta-po-28v.sys.comcast.net resimta-po-28v.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 resimta-po-23v.sys.comcast.net resimta-po-23v.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 resimta-po-20v.sys.comcast.net resimta-po-20v.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 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
550 5.7.133 authentication required; Delivery restriction check failed because the sender was not authenticated when sending to this group 1
SMTP; 552 5.1.1 recipient rejected - extended quota violation 1
rejected. /209.85.210.53 authenticated as already sent 400 messages for the last hour. The SMTP for this hosting account will be restored in 1 hour. See 550 http://www.siteground.com/terms.htm 1
554 resimta-po-08v.sys.comcast.net resimta-po-08v.sys.comcast.net 168.245.22.86 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL000010 1
552 User has recently been created/modified, and has exceeded an hourly sending limit. Please wait, and attempt to send your message at a later time. 1
554 resimta-po-02v.sys.comcast.net resimta-po-02v.sys.comcast.net 168.245.22.86 found on one or more DNSBLs, see http://postmaster.comcast.net/smtp-error-codes.php#BL000010 1
535 5.7.8 Error: authentication failed: Connection lost to authentication server 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.