Deliverability to yahoo.co.uk
Yahoo.co.uk is Yahoo!’s United Kingdom equivalent. To achieve worldwide brand consistency, new Yahoo! email registrants will be assigned only the @yahoo.com domain.
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Sent vs Opens for yahoo.co.uk

Date Sent Opens Open Rate
5/27/2023 1,537 273 0.0%
5/26/2023 3,663 916 0.0%
5/25/2023 6,394 1,929 0.0%
5/24/2023 4,727 1,093 0.0%
5/23/2023 4,295 992 0.0%
5/22/2023 3,223 680 0.0%
5/21/2023 1,216 304 0.0%
5/20/2023 1,778 364 0.0%
5/19/2023 4,814 1,209 0.0%
5/18/2023 7,590 2,648 0.0%
5/17/2023 5,959 1,644 0.0%
5/16/2023 7,456 2,450 0.0%
5/15/2023 3,886 1,099 0.0%
5/14/2023 1,429 404 0.0%
5/13/2023 1,688 393 0.0%
5/12/2023 4,097 1,001 0.0%
5/11/2023 7,417 1,046 0.0%
5/10/2023 7,124 1,196 0.0%
5/9/2023 5,951 1,497 0.0%
5/8/2023 3,451 784 0.0%
5/7/2023 1,663 424 0.0%
5/6/2023 1,904 480 0.0%
5/5/2023 5,170 1,271 0.0%
5/4/2023 5,074 1,187 0.0%
5/3/2023 4,862 1,195 0.0%
5/2/2023 4,310 1,026 0.0%
5/1/2023 3,046 857 0.0%
4/30/2023 1,364 334 0.0%
4/29/2023 1,801 441 0.0%
4/28/2023 4,271 1,040 0.0%

Blocks from yahoo.co.uk

No blocks during specified time frame

Bounces from yahoo.co.uk

Explanation of bounce codes

Message Count
552 1 Requested mail action aborted, mailbox not found 936
554 30 Sorry, your message to cannot be delivered. This mailbox is disabled . 373
Email was deferred due to the following reason: 12
Message queue continuously deferred for too long. See https://sendgrid.com/docs/glossary/throttling/#what-causes-a-deferral 12
554 Message permanently deferred due to unresolvable RFC.5321 from domain; see https://postmaster.yahooinc.com/error-codes 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
DNS Error. DNS type 'mx' lookup responded with code NXDOMAIN 2
535 5.7.8 Error: authentication failed: 2
553 5.7.1 : Sender address rejected: not owned by user 1
rejected. /209.85.218.48 as already sent 707.1 for 1h. The SMTP service for this hosting account will be restored 550 in 1 hour. See http://www.siteground.com/terms.htm 1
552 40 Requested mail action aborted 1
550 5.7.1 Message blocked. If this is a false positive, please report this to your hosting service provider. See https://console.mailchannels.net/insights/bounce?auid=duocircle&sender=steve%40ml-services.info&txid=46a5277a67e4a6d8 1
rejected. /209.85.218.51 as already sent 846.1 for 1h. The SMTP service for this hosting account will be restored 550 in 1 hour. See http://www.siteground.com/terms.htm 1
rejected. /209.85.218.49 as already sent 478.1 for 1h. The SMTP service for this hosting account will be restored 550 in 1 hour. See http://www.siteground.com/terms.htm 1
421 4.7.0 Messages from 159.183.73.171 temporarily deferred due to unexpected volume or user complaints - 4.16.55.1; see https://postmaster.yahooinc.com/error-codes 1
421-4.7.28 Our system has detected an unusual rate of 421-4.7.28 unsolicited mail originating from your IP address. To protect our 421-4.7.28 users from spam, mail sent from your IP address has been temporarily 421-4.7.28 rate limited. Please visit 421-4.7.28 https://support.google.com/mail/?p=UnsolicitedRateLimitError 1
rejected. /209.85.218.52 as already sent 1033.0 for 1h. The SMTP service for this hosting account will be restored 550 in 1 hour. See http://www.siteground.com/terms.htm 1
554 The apex class failed due to: unable to obtain exclusive access to this record or 1 records: 1
550 Requested action not taken: mailbox unavailable 1
550 5.4.1 Recipient address rejected: Access denied. AS 1
552 5.2.2 Quota exceeded 1
Circular loop detected 1
rejected. /209.85.218.46 as already sent 693.5 for 1h. The SMTP service for this hosting account will be restored 550 in 1 hour. See http://www.siteground.com/terms.htm 1
550 5.7.1 Message blocked. If this is a false positive, please report this to your hosting service provider. See https://console.mailchannels.net/insights/bounce?auid=duocircle&sender=steve%40ml-services.info&txid=69cf96cc65cac1bd 1
rejected. /209.85.208.41 as already sent 941.9 for 1h. The SMTP service for this hosting account will be restored 550 in 1 hour. See http://www.siteground.com/terms.htm 1
334 334 535 Incorrect authentication data 1
rejected. /209.85.218.43 as already sent 992.3 for 1h. The SMTP service for this hosting account will be restored 550 in 1 hour. See http://www.siteground.com/terms.htm 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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