On 15 Feb 2010, at 05:18, John Levine wrote:
I've used multiline greetings a lot, and I cannot remember any cases
where a legit client MTA had trouble with them. A really long one
will indeed make some spambots barf.
Yes, I used them before realising they were affecting my spam load, however I
have encountered a couple of instances, running really obscure software, that
were affected. I don't know whether, as pointed out AOL is now using them,
this matters as much now that it did then (about 2001 I think). I'm more
worried by the use of rules which are only *just* specified, in passing. They
seem to be more the common trait of the spammer than a willful violation of
standards, as such.