Yup. We've had a 10meg limit for years and get real tired of telling those users that insist on trying to use email as a file transfer system that email attachments grow when translated to internet format (user speak) typically from 20 to 50%.
-----Original Message----- From: Kurt Buff [mailto:kurt.b...@gmail.com] Sent: Friday, February 24, 2012 12:14 PM To: MS-Exchange Admin Issues Subject: Re: Exchange Attachment Size Issue On Fri, Feb 24, 2012 at 11:31, Benjamin Zachary <li...@levelfive.us> wrote: > Hi all, just an odd question. I have a client who sends out this 8.5MB pdf > contract , they have been using it for years, recently the last couple of > months its getting rejected as being larger than 10mb by many organizations. > > > > I did a quick test, and I see in the logs that when the email is sent the > transfer is over 11 million bytes . Doing some quick math 8.5MB * 1024 * > 1024 = 8912 , but Im seeing 11.4 , 11.3 on the smtp transfer. > > > > As a test I sent it to gmail, and sent it back and it was basically the same > 11.4 million bytes. I could shrink the PDF size down as a possible option > (they make about 30 of these per day) but was trying to figure out what > would make an 8.5MB email (no text , tried plain , rich, html) would come > across as 11.4 million (or 11 megs). My initial thought was that as people > move to the cloud exchange and hosted apps there probably is 10 meg limits , > but some of these are clients they do business with for years and is highly > unlikely to impose these kind of restrictions (although I am checking). > > > > Bottom line the client believes we did something in January to their > Exchange 2010 SP1 server that is causing this … > > > > Any ideas appreciated … The reason why it's going over 10mbytes is because of the Base64 encoding of the attachment - this is very common, and your case is actually mild - extreme cases can as much as double the expected size of the attachment, and the usual culprit in the extreme case is binary data, such as jpegs, etc. No idea why it's getting rejected more now than later, unless the recipient's orgs have gotten new appliances or cloud services that have that 10mb limit. Kurt --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
