Web based network tools
Monday 25th June 2007
On 25th June 2007, at 23:52pm PKT, Fawad Halim said:
I'd be interested to know how the email verify utility works. If it uses SMTP VRFY, there's very little chance that it'll give a reliable response. Postfix, for one, won't verify email addresses by default.
The pages for the individual utilities have the forms in the header, which is _very_ confusing IMHO. The main functionality (the textbox, and submit button) would look better in middle block.
On 26th June 2007, at 12:08pm PKT, Sajjad said:
No, I thought of using VRFY, but it isn't supported by Exim either. I implemented the same technique that Exim uses for sender verification, which is to exchange the "mail from" and "rcpt to" commands and read the response of the last command. Seems to work in most cases.
Thanks for the pointer on the form positioning. A couple of other people said the same thing, but I didn't get around to changing it. Fixed now.
On 26th June 2007, at 18:50pm PKT, Atif said:
Great news. I was wondering which DNS servers that site uses for lookups.
On 26th June 2007, at 21:06pm PKT, Fawad Halim said:
Thanks for the explanation. It'll probably work as well as can be expected.
This technique would return false positives for any email address on our company's domain as we have a Postfix based spam filter (Barracuda) in front of the actual mail server, so mail to arbitrary addresses is accepted, but would bounce from the backend server. Not a very good setup, I know.