I've also seen multi-line greetings from various servers for several
I think the trend to use multi-line greeting was begun as an anti-zombie
tactic, and the valid clients were quickly fixed.
Tony Finch wrote:
On Fri, 6 Apr 2007, John C Klensin wrote:
I don't know how many of them still exist in the wild, but there
was a time that a multiline opening greeting would cause some
clients to self-destruct.
There are a number of servers that have a multi-line greeting by default.
I've been running my server for years now with a multi-line greeting and
observed no interop problems (3M messages per week).