Hi, if someone sends you lots of crap from a handful of forged addresses, and your verification does not cache results, you might create a lot of connects to innocent systems (and possibly get blacklisted for that)
What happens if the other side does the same, and starts a smtp connection to your server in response to your verification attempt? You might get two machines locking up each other. A careful design (verifying at DATA command) would probably avoid that. Both sender address validation and CR may lose valid email I am using address verification but in the context of a web form: if a visitor is supplying an email that seems to be unreachable, he/she would be asked to supply a different one. Wolfgang Hamann Jean-Paul Natola wrote: is Sender Address Verification a feasible option? Let me rephrase , does anyone here use it? If not why?=20
