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It's been common knowledge that on top of the 102 Kb limit, Gmail also has a limit as to how much styles an email can have. In January 2017, I wrote:
With last year update, Gmail supports up to 8192 bytes of styles. (And this has been recently updated to 16384 bytes according to Eric Lepetit on the Emailgeeks Slack.) Gmail will only keep the styles rules before that limit.
I've been testing this back in 2016 but I don't think I figured it out and thus didn't post it here. Here are a few tests I did.
I used a template with a single <p> elements and n style declarations with an incrementing color: p{color:#000000;}p{color:#000001;}…. I'm generating this with a loop in PHP:
01. Test with multiple <style> tag and 1024 declarations
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Gmail Style Length</title>
<style>p{color:#000000;}p{color:#000001;}p{color:#000002;}p{color:#000003;}p{color:#000004;}p{color:#000005;}p{color:#000006;}p{color:#000007;}p{color:#000008;}p{color:#000009;}p{color:#000010;}p{color:#000011;}p{color:#000012;}p{color:#000013;}p{color:#000014;}p{color:#000015;}p{color:#000016;}p{color:#000017;}p{color:#000018;}p{color:#000019;}p{color:#000020;}p{color:#000021;}p{color:#000022;}p{color:#000023;}p{color:#000024;}p{color:#000025;}p{color:#000026;}p{color:#000027;}p{color:#000028;}p{color:#000029;}p{color:#000030;}p{color:#000031;}</style><style>p{color:#000032;}p{color:#000033;}p{color:#000034;}p{color:#000035;}p{color:#000036;}p{color:#000037;}p{color:#000038;}p{color:#000039;}p{color:#000040;}p{color:#000041;}p{color:#000042;}p{color:#000043;}p{color:#000044;}p{color:#000045;}p{color:#000046;}p{color:#000047;}p{color:#000048;}p{color:#000049;}p{color:#000050;}p{color:#000051;}p{color:#000052;}p{color:#000053;}p{color:#000054;}p{color:#000055;}p{color:#000056;}p{color:#000057;}p{color:#000058;}p{color:#000059;}p{color:#000060;}p{color:#000061;}p{color:#000062;}p{color:#000063;}</style><style>p{color:#000064;}p{color:#000065;}p{color:#000066;}p{color:#000067;}p{color:#000068;}p{color:#000069;}p{color:#000070;}p{color:#000071;}p{color:#000072;}p{color:#000073;}p{color:#000074;}p{color:#000075;}p{color:#000076;}p{color:#000077;}p{color:#000078;}p{color:#000079;}p{color:#000080;}p{color:#000081;}p{color:#000082;}p{color:#000083;}p{color:#000084;}p{color:#000085;}p{color:#000086;}p{color:#000087;}p{color:#000088;}p{color:#000089;}p{color:#000090;}p{color:#000091;}p{color:#000092;}p{color:#000093;}p{color:#000094;}p{color:#000095;}p{color:#000096;}p{color:#000097;}p{color:#000098;}p{color:#000099;}p{color:#000100;}p{color:#000101;}p{color:#000102;}p{color:#000103;}p{color:#000104;}p{color:#000105;}p{color:#000106;}p{color:#000107;}p{color:#000108;}p{color:#000109;}p{color:#000110;}p{color:#000111;}p{color:#000112;}p{color:#000113;}p{color:#000114;}p{color:#000115;}p{color:#000116;}p{color:#000117;}p{color:#000118;}p{color:#000119;}p{color:#000120;}p{color:#000121;}p{color:#000122;}p{color:#000123;}p{color:#000124;}p{color:#000125;}p{color:#000126;}p{color:#000127;}</style><style>p{color:#000128;}p{color:#000129;}p{color:#000130;}p{color:#000131;}p{color:#000132;}p{color:#000133;}p{color:#000134;}p{color:#000135;}p{color:#000136;}p{color:#000137;}p{color:#000138;}p{color:#000139;}p{color:#000140;}p{color:#000141;}p{color:#000142;}p{color:#000143;}p{color:#000144;}p{color:#000145;}p{color:#000146;}p{color:#000147;}p{color:#000148;}p{color:#000149;}p{color:#000150;}p{color:#000151;}p{color:#000152;}p{color:#000153;}p{color:#000154;}p{color:#000155;}p{color:#000156;}p{color:#000157;}p{color:#000158;}p{color:#000159;}p{color:#000160;}p{color:#000161;}p{color:#000162;}p{color:#000163;}p{color:#000164;}p{color:#000165;}p{color:#000166;}p{color:#000167;}p{color:#000168;}p{color:#000169;}p{color:#000170;}p{color:#000171;}p{color:#000172;}p{color:#000173;}p{color:#000174;}p{color:#000175;}p{color:#000176;}p{color:#000177;}p{color:#000178;}p{color:#000179;}p{color:#000180;}p{color:#000181;}p{color:#000182;}p{color:#000183;}p{color:#000184;}p{color:#000185;}p{color:#000186;}p{color:#000187;}p{color:#000188;}p{color:#000189;}p{color:#000190;}p{color:#000191;}p{color:#000192;}p{color:#000193;}p{color:#000194;}p{color:#000195;}p{color:#000196;}p{color:#000197;}p{color:#000198;}p{color:#000199;}p{color:#000200;}p{color:#000201;}p{color:#000202;}p{color:#000203;}p{color:#000204;}p{color:#000205;}p{color:#000206;}p{color:#000207;}p{color:#000208;}p{color:#000209;}p{color:#000210;}p{color:#000211;}p{color:#000212;}p{color:#000213;}p{color:#000214;}p{color:#000215;}p{color:#000216;}p{color:#000217;}p{color:#000218;}p{color:#000219;}p{color:#000220;}p{color:#000221;}p{color:#000222;}p{color:#000223;}p{color:#000224;}p{color:#000225;}p{color:#000226;}p{color:#000227;}p{color:#000228;}p{color:#000229;}p{color:#000230;}p{color:#000231;}p{color:#000232;}p{color:#000233;}p{color:#000234;}p{color:#000235;}p{color:#000236;}p{color:#000237;}p{color:#000238;}p{color:#000239;}p{color:#000240;}p{color:#000241;}p{color:#000242;}p{color:#000243;}p{color:#000244;}p{color:#000245;}p{color:#000246;}p{color:#000247;}p{color:#000248;}p{color:#000249;}p{color:#000250;}p{color:#000251;}p{color:#000252;}p{color:#000253;}p{color:#000254;}p{color:#000255;}</style><style>p{color:#000256;}p{color:#000257;}p{color:#000258;}p{color:#000259;}p{color:#000260;}p{color:#000261;}p{color:#000262;}p{color:#000263;}p{color:#000264;}p{color:#000265;}p{color:#000266;}p{color:#000267;}p{color:#000268;}p{color:#000269;}p{color:#000270;}p{color:#000271;}p{color:#000272;}p{color:#000273;}p{color:#000274;}p{color:#000275;}p{color:#000276;}p{color:#000277;}p{color:#000278;}p{color:#000279;}p{color:#000280;}p{color:#000281;}p{color:#000282;}p{color:#000283;}p{color:#000284;}p{color:#000285;}p{color:#000286;}p{color:#000287;}p{color:#000288;}p{color:#000289;}p{c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</head>
<body>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Mollitia est, nesciunt assumenda, iure odit eveniet veritatis. Harum nostrum, magni quibusdam. Et maiores libero asperiores sit, ipsum corporis amet necessitatibus deleniti!</p>
</body>
</html>
Results: The last <style> tag (containing declarations from 512 to 1023) is completely removed.
02. Test with 1024 <style> tag with 1 declaration each
Results: The last color applied is 962. <style> tag (containing declarations from 512 to 1023) is completely removed. This makes all the styles rules combined exactly 16 Kb.
One thing that would be interesting to test is wether this count is done before or after Gmail's parsing (prefixing/filtering).
The text was updated successfully, but these errors were encountered:
It's been common knowledge that on top of the 102 Kb limit, Gmail also has a limit as to how much styles an email can have. In January 2017, I wrote:
I've been testing this back in 2016 but I don't think I figured it out and thus didn't post it here. Here are a few tests I did.
I used a template with a single
<p>
elements andn
style declarations with an incrementing color:p{color:#000000;}p{color:#000001;}…
. I'm generating this with a loop in PHP:01. Test with multiple <style> tag and 1024 declarations
Results: The last
<style>
tag (containing declarations from 512 to 1023) is completely removed.02. Test with 1024 <style> tag with 1 declaration each
Results: The last color applied is 962.
<style>
tag (containing declarations from 512 to 1023) is completely removed. This makes all the styles rules combined exactly 16 Kb.One thing that would be interesting to test is wether this count is done before or after Gmail's parsing (prefixing/filtering).
The text was updated successfully, but these errors were encountered: