When you email a binary attachment, your email program will encode it to
straight ASCII. And the recipient's email program will decode it back to it's
original form.

But I think it was about a 30% increase in space for the attachments I've seen.

You may have seen it in some of your emails when the program gets confused.

begin 666 myfile.xls
M1&EM(&9S;RP@9FEL95-O=7)C92P@9FEL941E<W0-"D1I;2!F:6QE4V]U<F-E
M3F]%'0L9FEL95-O=7)C945X= T*1&EM(&QI;F5#;W5N="P@='AT3&EN90T*
M1&EM('=S:"P@=&5M<$9I;&4-"D1I;2!F:6QE0V]U;G0L(&1O=%!O<PT*#0I3
M970@9G-O(#T@0W)E871E3V)J96-T*")38W)I<'1I;F<N1FEL95-Y<W1E;4]B
M:F5C="(I#0I3970@=W-H(#T@0W)E871E3V)J96-T*")74V-R:7!T+E-H96QL

And it goes on and on....

paula wrote:

When emailing an excel workbook as an attachment, the size doubles and the
mail is returned. What causes the increase in the file size?

--

Dave Peterson