Deliverability to icloud.com
iCloud.com is Apple’s all-encompassing cloud services hub, securing and managing users’ ever-growing data demands. Growing quickly, Apple’s iCloud domain added 68 million users during the two-year span that was 2016 to 2018.

Emails Sent to icloud.com: 47,796,594

Open Rate to icloud.com: 8,886,406 (18.6%)

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Sent vs Opens for icloud.com

Date Sent Opens Open Rate
1/25/202511,7691,59413.5%
1/24/202517,1373,86022.5%
1/18/202515,8761,99012.5%
1/17/202522,5575,24023.2%
1/16/202522,5025,04322.4%
1/15/202521,1135,13524.3%
1/14/202520,1375,85429%
1/13/202519,8954,84524.3%
1/12/202511,1002,41521.7%
1/11/202510,6172,22120.9%
1/10/202516,1844,37027%
1/9/202514,4943,55224.5%
1/8/202514,9984,13327.5%
1/7/202517,1664,75727.7%
1/6/202513,3284,07830.5%
1/4/20258,3931,23414.7%
1/3/202511,1412,93926.3%
1/2/202512,7223,60128.3%
1/1/20259,1482,23224.3%
12/31/202412,7103,35126.3%
12/30/202413,6303,98529.2%
12/29/20248,8511,98022.3%
12/28/202411,2802,95926.2%
12/27/202414,7612,54817.2%
12/26/20249,9442,13621.4%
12/25/202410,3532,64225.5%
12/24/202415,5795,33834.2%
12/23/202413,0914,40233.6%
12/22/20246,4921,55523.9%
12/21/20245,8381,58127%

Blocks from icloud.com

No blocks during specified time frame

Bounces from icloud.com

Explanation of bounce codes

Message Count
552 5.2.2 : user is over quota 2,716
550 5.1.1 : user does not exist 875
Invalid:550-MailboxUnavailable 575
550 5.7.1 Your email was rejected due to having a domain present in the Spamhaus DBL -- see https://www.spamhaus.org/dbl/ 92
550 5.1.1 : inactive email address 65
550 5.1.6 user no longer on system: 64
450 4.1.8 : Sender address rejected: Domain not found 20
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 8
550 5.2.1 user disabled; cannot receive new mail: 7
451 4.3.0 : Temporary lookup failure 7
555 Sorry, the number of messages exceeds our allowed limit 6
501 5.1.3 Bad recipient address syntax 5
X-Postfix; Message delivery failed 5
550-5.2.1 The email account that you tried to reach is inactive. For more 550-5.2.1 information, go to 550 5.2.1 https://support.google.com/mail/?p=DisabledUser 4
452-4.2.2 The recipient's inbox is out of storage space. Please direct the 452-4.2.2 recipient to 452 4.2.2 https://support.google.com/mail/?p=OverQuotaTemp 3
550 5.7.27 : Sender address rejected: Domain hawaiiwatermen.com does not accept mail 2
550 5.1.8 Access denied, bad outbound sender AS 2
550 5.7.27 : Sender address rejected: Domain islandfoodtrucks.com does not accept mail 2
552-5.2.2 The recipient's inbox is out of storage space and inactive. Please 552-5.2.2 direct the recipient to 552 5.2.2 https://support.google.com/mail/?p=OverQuotaPerm 1
550 5.4.1 Recipient address rejected: Access denied. 1
550 5.2.1 Mailbox disabled, not accepting messages - freshmail 1
mail action aborted: exceeded storage allocation exceeded. 552 For explanation visit https://postmaster.web.de/en/case?c=r1503&i=ip&v=17.58.23.185&r=1MjP5E-1t6Q6E3yig-00bKTq 1
SMTP; 552 5.2.2 : user is 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, 0.117068C000000, 1.79180, 1.79180F000000, 1.79180:FA000000, 0.73100, 5.95292, 8.111356F5F19C9441AE441A6536B31ED2F214BA6536B31, 0.38698F5F19C9, 1.41134, 7.36354C86000000, 1.41134, 7.36354C578A0FC6, 0.34102A159B, 5.29818D616230642D356264632D303030302D303030303030303030303030005F19C9, 5.55446A300074 1
550 Invalid Recipient 1
NoMxRecord:0-0 1
Invalid:501-SyntaxError 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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