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iCloud email - Message Size Violation

Emails are rejected by the iCloud email server, apparently for the following reason: "5.7.0 Message Size Violation", however this happens at random, irrespective of the actual message size.

Posted on Feb 18, 2013 8:44 AM

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8 replies

Feb 18, 2013 9:07 AM in response to KarenSelena

Thank you for your fast reply, however we are having a different problem here. The email system behaves complete at random in terms of message size. Out of 6 messages, differing only by attachment size and otherwise completely identical, it will recieve only Message 2, 3 and 5.


Message 1 - size 6 MB - rejected

Message 2 - size 400k

Message 3 - size 6 MB

Message 4 - size 16 MB - rejected

Message 5 - size 20 MB

Message 6 - size 7 MB - rejected

Feb 18, 2013 9:52 AM in response to KarenSelena

I should apologize for not making it clear enough, that it is the iCloud imap server, which has problems recieving messages for me. It rejects incoming emails at random, incorrectly reporting back "Message Size Violation" to the sender, regardless of actual message size. The operating system should not matter here, but i am on Mac OS X 10.8.2.

Jul 1, 2014 7:48 AM in response to twrmark

I think that twrmark has hit the nail on the head. I had a 352k .zip file comprising 716 files and folders that iCloud rejected. I'm guessing that they unzip the files on reception to check for viruses, and their system freaks out when there are "too many" files.


Sending a .tar.gz of the same information (which also ended up being only 68k!) delivered just fine.

iCloud email - Message Size Violation

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