2.2.12 [RFC5545] Section 3.2.7, Inline Encoding
V0019:
The specification describes the optional ENCODING parameter.
Microsoft Office Outlook 2007, Microsoft Outlook 2010, Microsoft Outlook 2013, Microsoft Outlook 2016, Microsoft Outlook 2019
Outlook only exports an ENCODING parameter for the ATTACH property, and the value is always "BASE64".
On import, Outlook ignores the ENCODING parameter on any non-text type property other than the ATTACH property. Furthermore, Outlook ignores any ATTACH property that does not have one of the following combinations of the ENCODING and VALUE parameters:
|
ENCODING |
VALUE |
|---|---|
|
absent |
absent |
|
BASE64 |
BINARY |
On import, the ENCODING parameter is ignored on text type properties unless it is set to "QUOTED-PRINTABLE".