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From screenshot i understand that you have configured receive message size. You have to configure the send message size.<br />
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<a href="https://msdn.microsoft.com/en-us/library/azure/bb124345(v=exchg.150).aspx" rel="ugc">https://msdn.microsoft.com/en-us/library/azure/bb124345(v=exchg.150).aspx</a><br />
<a href="https://rajisubramanian.wordpress.com/2014/01/26/exchange-server-2013-message-size-configuration-detail/" rel="ugc">https://rajisubramanian.wordpress.com/2014/01/26/exchange-server-2013-message-size-configuration-detail/</a>
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From screenshot i understand that you have configured receive message size. You have to configure the send message size.

https://msdn.microsoft.com/en-us/library/azure/bb124345(v=exchg.150).aspx [https://msdn.microsoft.com/en-us/library/azure/bb124345(v=exchg.150).aspx]
https://rajisubramanian.wordpress.com/2014/01/26/exchange-server-2013-message-size-configuration-detail/ [https://rajisubramanian.wordpress.com/2014/01/26/exchange-server-2013-message-size-configuration-detail/]

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This email attachment size limit message is driving me crazy, I have revised everything and still haven been able to understand why exchange is restricting the size since I have increased it to 35mb, can someone here help?<br />
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&quot;This message wasn't delivered to anyone because it's too large. The limit is 10 MB. This message is 21 MB&quot;<br />
<a href="https://filedb.experts-exchange.com/incoming/2017/06_w23/1166376/Desctop-screenshot.png" target="_blank" class="file-inline" title="error message (35 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>Desctop-screenshot.png</a><br />
<a href="https://filedb.experts-exchange.com/incoming/2017/06_w23/1166377/Desctop-screenshot--1-.png" target="_blank" class="file-inline" title="exchange connector size (23 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>Desctop-screenshot--1-.png</a>
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Desctop-screenshot--1-.png

Desctop-screenshot.png

This email attachment size limit message is driving me crazy, I have revised everything and still haven been able to understand why exchange is restricting the size since I have increased it to 35mb, can someone here help?

"This message wasn't delivered to anyone because it's too large. The limit is 10 MB. This message is 21 MB"

Microsoft Exchange 2013 Attachment Size Limit Message

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.