Return-Path: Received: from fed1mtao07.cox.net ([68.6.19.124] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2573688 for flyrotary@lancaironline.net; Tue, 09 Sep 2003 13:44:14 -0400 Received: from BigAl ([68.107.116.221]) by fed1mtao07.cox.net (InterMail vM.5.01.06.04 201-253-122-130-104-20030726) with ESMTP id <20030909174412.XCE4315.fed1mtao07.cox.net@BigAl> for ; Tue, 9 Sep 2003 13:44:12 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: File size Date: Tue, 9 Sep 2003 10:44:20 -0700 Message-ID: <000001c376fa$0018c230$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C376BF.53B9EA30" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4024 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C376BF.53B9EA30 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit When you are transmitting a binary file, like a picture, the actual size of the transmission increases. Why? Because the binary data is being transmitted in visible characters, sort of 6 bit "bytes". In other words 8 bit bytes are expanded into 6 bit "bytes". So the size increases by at least 8/6 = 33%. On top of that you have all the mail headers. View the "Message Source" of a received message containing pictures sometime and note the "Content-Transfer-Encoding: base64" tag preceeding the block of 6-bit ASCII characters representing the picture. 6 bits gives you 64 possible characters. Finn So I guess Marv was right - it's the new math. Al > "Al Gietzen" : > > Marv; > > How does your e-mail system add-up bytes? I sent a posting that had 3 > attached files totaling 82KB. The letter itself was 224 bytes. It was > rejected as beign over 100KB. > > > > Maybe it's time to increase the limit? > > > > Al > >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0001_01C376BF.53B9EA30 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

 

 

When you are transmitting a binary file, like a picture, the actual size =

of the transmission increases.

Why? Because the binary data is being transmitted in visible characters, =

sort of 6 bit "bytes". In other words 8 bit bytes are expanded into = 6

bit "bytes".   So the size increases by at least 8/6 =3D = 33%.

On top of that you have all the mail headers.

 

View the "Message Source" of a received message containing pictures =

sometime and note the

"Content-Transfer-Encoding: base64" tag preceeding the block of 6-bit

ASCII characters representing the picture. 6 bits gives you 64 possible =

characters.

 

Finn

 

So I guess = Marv was right – it’s the new math.

 <= /font>

Al

 

> "Al Gietzen" <ALVentures@cox.net>:

>

> Marv;

>

> How does your e-mail system add-up bytes?  I sent a posting that = had 3

> attached files totaling 82KB.  The letter itself was 224 = bytes.  It was

> rejected as beign over 100KB.

>

> 

>

> Maybe it's time to increase the limit?

>

> 

>

> Al

>

 

 

 

 

>>  Homepage:  http://www.flyrotary.com/

>>  Archive:   = http://lancaironline.net/lists/flyrotary/List.html

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