On Sat, 2008-05-17 at 13:57 -0400, John R Levine wrote:
Another one: String lengths.
You're right, it's a problem. The hand-wave is to assert that few MTAs
enforce the 64 character limit, but I realize that's not very persuasive
for a standard. On the other hand, since there's no nesting, the damage
is at least predictable. The current spec adds 16 characters to each
address but I've been considering a modified version with 10 characters
that addresses some greylisting problems as well.
As a data point, I have seen many European receivers choke on > 64 char
local parts. I don't have a list of those domains (and it was may 4
years ago), but when I tested a BATV like scheme here at work which
allowed > 64 characters, messages were not delivered.
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