MIME Multipart/related appendix:
This is how the MIME multipart/related package will look like when the the parts are:
<AdsML-5701-1@creative.com> - 3-6_AM-M.xml AdsML message.
<AdsML-090876576-001@creative.com> - the pdf rendering
<AdsML-090876576-002@creative.com> - the gif low res rendering


MIME-Version: 1.0
Content-Type: multipart/related;
	boundary="__=_Part_Boundary_001_021681.028121"

--__=_Part_Boundary_001_021681.028121
Content-ID: <AdsML-5701-1@creative.com>
Content-Transfer-Encoding: base64
Content-Type: text/xml
Content-Disposition: attachment;
	filename="3-6_AM-M.xml"

PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTgiID8+IA0KPCEtLU9ubHkgMXN0IGlu
cHV0IGZpbGUgc2hvdWxkIGJlIGRlbGV0ZWQgYWZ0ZXIgc2VuZCAtLT4NCjwhLS0xMCBEYXlzIGV4
cGlyYXRpb24gLS0+DQo8SkRGIElEPSJJRF81NjciIFR5cGU9IkRpZ2l0YWxEZWxpdmVyeSIgRGVz
Y3JpcHRpdmVOYW1lPSJFeGlzaXRpbmcgSkRGIGV4YW1wbGUiIFN0YXR1cz0iV2FpdGluZyIgVmVy
dWRpdFBvb2w+DQo8L0pERj4NCg==

--__=_Part_Boundary_001_021681.028121
Content-ID: <AdsML-090876576-001@creative.com>
Content-Transfer-Encoding: base64
Content-Type: application/pdf
Content-Disposition: attachment;
	filename="CP_090876576_NewSlogan.pdf"
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--__=_Part_Boundary_001_021681.028121
Content-ID: <AdsML-090876576-002@creative.com>
Content-Transfer-Encoding: base64
Content-Type: image/gif
Content-Disposition: attachment;
	filename="LR_090876576_005.gif"

IFJ1bj0iMiI+DQogICAgICAgICAgICA8TGF5b3V0RWxlbWVudD4NCiAgICAgICAgICAgICAgIDxG
aWxlU3BlYyBGaWxlU2l6ZT0iMjYyNDAiIFVSTD0iY2lkOjMtMTIzNDVAdmlvLmpkZi5jb20iPiAN
CiAgICAgICAgICAgICAgICAgIDxEaXNwb3NpdGlvbiBEaXNwb3NpdGlvbkFjdGlvbj0iQXJjaGl2
ZSIvPg0KICAgICAgICAgICAgICAgPC9GaWxlU3BlYz4NCiAgICAgICAgICAgIDwvTGF5b3V0RWxl
bWVudD4NCiAgICAgICAgIDwvUnVuTGlzdD4NCiAgICAgICAgPC9SdW5MaXN0Pg0KDQogICAgICA8

--__=_Part_Boundary_001_021681.028121--