Not only is there an ever larger stream of irrelevant junk e-mail, the individual mail is growing larger at an alarming rate.
Ignoring screen dumps send as uncompressed bitmaps like BMP is one thing, all mail users should know that is a no-go. Permanently expanding each and every mail by visual overkill is quite another.
There is a fine line between adding a logo, a frame and a few useful URLs up to the the recent over plastering of e-mails with heavy graphics that makes the very opening an arduous task.
What is worse, many of the nice features are coded wrong and may not show at all. Larger corporations are rightfully clamping down on both size and security, leaving the end-result worse off than a plain but predictable text message. The nice but heavy and potentially dangerous layout is scraped away, leaving an information skeleton that shows little respect for users of more restrictive systems.
Anyone who've seen a plain text reply to a loaded HTML mail knows just exactly how confusing and out-off place the revealed codes may appear. Going from 20k connected graphics to 2k safe text is not pretty...
e-Presence is also a question of effective presence. A presence where sender and receiver have aligned their bandwidth and messages are send in the proper format, size and pizazz.