Milter-greylist

On Tue, Jun 01, 2004 at 06:32:49PM +0200, Enrico Scholz wrote:
> Longest 'FROM' addresses are around 90 characters (maillist bounce-addresses)
> here. So 128 seems to be a good value.

It would be best to refer to the RFCs here. RFC2821 says:

4.5.3.1 Size limits and minimums

   There are several objects that have required minimum/maximum sizes.
   Every implementation MUST be able to receive objects of at least
   these sizes.  Objects larger than these sizes SHOULD be avoided when
   possible.  However, some Internet mail constructs such as encoded
   X.400 addresses [16] will often require larger objects: clients MAY
   attempt to transmit these, but MUST be prepared for a server to
   reject them if they cannot be handled by it.  To the maximum extent
   possible, implementation techniques which impose no limits on the
   length of these objects should be used.

   local-part
      The maximum total length of a user name or other local-part is 64
      characters.

   domain
      The maximum total length of a domain name or number is 255
      characters.