Если я не ошибаюсь, решение "quoted-printable" работает, но оно создает проблемы с двоичными вложениями. Поэтому я написал небольшую функцию VbScript, которая исправляет длинные строки и делает htmlbody совместимым со всеми клиентами. Вот оно:
<%
'
' **** fix CDOSYS exclamation mark problem - TFI 10/22/2013 - v1.1
'
' This function breaks a string into 76 chars (or less) lines, thus avoiding
' the "exclamation mark" problem when sending e-mails through CDOSYS component
' v.1.1 - fixed a bug that clipped the message at its end
function fixstring(string1)
Dim string2,pstart,pos0,pos1,part
string2=""
pstart=1
do
part=mid(string1,pstart,76)
pos0=instr(part,vbcrlf)
if pos0=0 then
pos1=instrrev(part," ")
if pos1=0 then
string2=string2&part&vbcrlf
pstart=pstart+76
else
string2=string2&left(part,pos1)&vbcrlf
pstart=pstart+pos1
end if
else
string2=string2&left(part,pos0)&vbcrlf
pstart=pstart+pos0
end if
loop while pstart<len(string1)
fixstring=string2
end function
string1="Lorem ipsum dolor sit"&vbcrlf&"amet, consectetur adipiscing elit. Sed in dignissim risus. Vestibulum ac justo sed massa posuere pellentesque non et odio. Suspendisse scelerisque sed ante in ullamcorper. Sed vel diam sed ligula commodo aliquet. Fusce aliquam eleifend arcu, vitae euismod purus pellentesque ac. In adipiscing, eros a semper semper, magna ligula volutpat dui, a vulputate nisl tellus a nisi. Donec et fringilla tellus. Praesent nibh neque, hendrerit ut fringilla eget, condimentum nec ligula. Mauris porta et velit et faucibus. Morbi aliquam risus urna, eu ultricies purus venenatis eget. Donec elementum ante dictum, euismod augue at, euismod lorem. Praesent sit amet tempus est. Nam et neque mollis, pretium ante sed, aliquet enim. abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrs Integer vestibulum lacus euismod lectus placerat, ut commodo metus tempor. Vivamus sagittis mauris id fringilla mattis. Nam convallis accumsan nulla nec eleifend. Suspendisse lobortis iaculis magna vel convallis. Ut id metus posuere, ullamcorper sapien at, sodales massa. Aenean commodo quis dolor vitae convallis. Duis sed metus non nisl commodo porttitor a sed augue. Vestibulum non risus bibendum, aliquam nulla vel, imperdiet sem. Suspendisse mattis eu lorem ac accumsan. Donec eget pulvinar libero. Nam cursus gravida gravida. Proin interdum elementum euismod. Nunc nec viverra ipsum. Nunc ultrices purus nisi, sed scelerisque elit suscipit ut. "
response.write "<b>string1:</b><br>"&string1&"<BR><br>"
response.write "<b>string2:</b><br>"&replace(fixstring(string1),vbcrlf,"<br>")
%>