Cameron Laird's personal survey of POP3 MDA usage
Table of contents
[I'll be adding plenty more links and comments in spring '99. If
you're anxious to see a particular aspect,
write me, and I'll
bring it on-line.]
Which POPpers are in use?
This page aims to answer that question.
For more on this subject, see
articles in SunWorld Online.
This is how I run a survey:
In the future, I might sort results geographically.
My first runs were overweighted toward Japan, and underweighted
from Europe and South America, for my technical convenience.
- Collect e-mail addresses.
- Extract e-mail domain names. Sort and discard duplicates.
- Do DNS look-ups for MX records. Now I have a list of distinct
IP addresses which respond to SMTP.
- Interrogate the POP3 port (110/tcp) for each IP address.
- Sort results.
I'm not now posting source code or, as I originally intended,
providing a public automation for running a new survey.
I have security and privacy issues I want to mull over a
bit more. In the meantime, any individual who wants
details is welcome to
I admire the analogous work done by
I'll post results in May 1999.
I'm not claiming statistical validity, because, among other
reasons, there's no canonical sense of the shape of valid
results. That is, different readers might want results
weighted by in-box count, message volume, and so on. This
survey is objective and largely reproducible, though,
and the results interest me, at least. For example, I was
surprised at the incidence of NMS
Laird's personal survey of POP3 mail delivery