On 13 Dec 2017, at 21:08 (-0500), David B Funk wrote:
[...]
There's nothing that prevents a mailer from using either for purely 7-bit ASCII, even though it isn't necessary. You are more likely to see that used by international clients. They may just utf-8 encode by default so not to have to do special processing for non 7-bit ASCII headers.
There's even a SA rule for that: FROM_EXCESS_BASE64 -- Bill Cole b...@scconsult.com or billc...@apache.org (AKA @grumpybozo and many *@billmail.scconsult.com addresses) Currently Seeking Steady Work: https://linkedin.com/in/billcole
