@nriley For me, it does remember the scroll position per mailbox, but it reset each mailbox to the top once.
@optshiftk No—after.
@optshiftk Same here.
@dnanian As I recall it was more like 300 MB total under Mavericks.
@dnanian Yosemite Mail is using about 489 MB of RAM for me, plus 280 MB for Mail Web Content, without a single message open for viewing.
@leebennett Me, too.