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domingo, 28 de novembro de 2004
Entrevista com o autor do Postfix
William da Rocha Lima (wrochal@linuxit.com.br) enviou este link e acrescentou: "Semana passada eu entrevistei nada mais do que o criador do Postfix, o Wietse Venema ... (Ler na íntegra)Publicado por brain às 23:35
Comentários dos leitores
(Termos de Uso)
» Comentário de William da Rocha Lima () em 28/11 23:42
Em breve terá mais entrevistas, uma melhor que a outra...
Até,
» Comentário de VMedina () em 28/11 23:48
Legal William! Boa iniciativa a sua. Se quiser se cadastrar no livre.pmro.rj.gov.br e enviar notícias que apareçam no seu site tb pode mandar!
:)
ps: está gostando da lista do mozilla?
t+
» Comentário de Pierre () em 29/11 00:25
Eu particularmente gosto bastante de ler entrevistas, pois é uma oportunidade de conhecermos de perto membros ilustres da comunidade.
» Comentário de William da Rocha Lima () em 29/11 00:35
Caro Vmedina,
Eu entrei no site pelo FF 1.0 BR no Linux e esta meio desfocado o site, veja se ai acontece o mesmo. E estou gostando da lista que é bem movimentada.
E Pierre vou adiantar aqui alguns nomes que estou tentando entrevistar:
Dan Bernstein - Criador do Qmail, Djbdns e etc.
Tobias Oetiker - Desenvolvendor do MRTG, RRDTools e etc.
E mais alguns nomes que prefiro manter segredo. (risos)
Falou,
» Comentário de Willian da Rocha Lima () em 29/11 23:55
Caros e depedendo do resultado da pesquisa que lancarei no site, estarei publicando uma entrevista comigo, quem estiver interessado basta votar no sim.
Falou,
» Comentário de William da Rocha Lima () em 30/11 00:27
Estou vendo que alguém se passando por mim esta afim de se aparecer, calma fracassado.... um dia vc consegue...(risos)..
» Comentário de Eu () em 30/11 11:25
Será que você não copiou a entrevista nao ?
Como fez com aquele script ?
Ou podemos tb pensar na possibilidade de vc ser o autor do postfix na entrevista tb. :)
NAO www.plagioIT.com.br
» Comentário de Douglas Augusto () em 30/11 11:32
Gosto e utilizo o Postfix, só tenho um empecilho com ele: não consigo selecionar um servidor SMTP (remoto) de acordo com o endereço de e-mail *remetente* (muito útil para quem utiliza várias contas de e-mail e precisa usar servidores SMTP diferentes). O contrário é perfeitamente possível, isto é, consigo selecionar o servidor SMTP de acordo com o e-mail *destinatário*.
De qualquer forma, o Postfix tem me servido muito bem.
» Comentário de William da Rocha Lima () em 01/12 00:47
Caro Eu,
Você deve ser mais uma I.......o
Então abaixo segue o e-mail de contato com o autor do Postfix:
------ Inicio do E-mail
William da Rocha Thu, Nov 18, 2004 at 3:56AM
To: adame@us.ibm.com
Cc: William da Rocha Lima
Dear Wietse,
These are the questions of the interview
What do you do beyond keeping Postfix project?
What do you do on your free time and what's your hobby?
How and when did the idea of making Postfix start?
Beyond Postfix, which projects do you develop or participate?
Which documentations would you recommend to someone who wants to implement
Postfix, with these following means: Anti-SPAN, Anti-Virus, MySQL,
authenticated SMTP and IMAP.
Would you recommend any specific postfix configuration?
Tell me a little about postfix's future?
What do you think about other MTA's, namely Sendmail, QMail and Exim, having
stability and security in mind?
Why having one more MTA, since there are already Sendmail, QMail, etc.
Which are the advantages of using postfix instead of QMail?
Which SPAM blockin tool and anti-virus would you recommend to use
along with postfix?
Advertisements are made, in general kindly to try convincing the client
to purchase the product. SPAM has been used massively to advertise all sorts
of products and this bother everyone, contradicting advertisement's logic.
Do you think SPAM brings any benefit as an advertisement for those who
use it, justifying its raise. What's your opinion about internet's present and
future, considering the large amount of garbage and links overload
caused by SPAM?
What do you think about proprietary anti-virus systems (F-Secure,
MailScan, BitDefender, etc) to use along with open-source MTAs, since
we have already free and open-source solutions, like Clamav, Amavia,
etc.?
What distribution do you use? Why did you choose it?
What did you think about Brazil, in times you have been to here?
What's your opinion about Free software advance in Brazil?
Do you frequently visit any brazilian community web site?
At last, what arguments would you use to persuade someone to use Postfix,
instead of another MTA?
Thanks for the interview. I'd be glad if you want to do any commentary...
--
William da Rocha
wrochal@gmail.com
wrochal@linuxit.com.br
www.linuxit.com.br
ICQ: 111752037
MSN: wrochal / wrochalima
Adam Emery Tue, Nov 23, 2004 at 2:30PM
To: William da Rocha
Hi William:
Here are responses to your questions that you can attribute to Wietse Venema, security researcher, IBM Research (located in Hawthorne, New York).
Thanks.
Adam Emery
Public Relations
IBM Research
914-945-2121 (t/l: 862)
adame@us.ibm.com
----- Forwarded by Adam Emery/Watson/IBM on 11/18/2004 06:33 PM -----
William da Rocha
11/18/2004 12:56 AM
Please respond to wrochal
To: Adam Emery/Watson/IBM@IBMUS
cc: William da Rocha Lima
Subject: Interview for LinuxIT
Dear Wietse,
These are the questions of the interview
1 - What do you do beyond keeping Postfix project?
There are many things. I just finished a book called "Forensic
Discovery" on computer forensics that appears in print in December
2004, and then I do some projects inside IBM with other researchers.
2 - What do you do on your free time and what's your hobby?
Nothing with computers :-) In the summer we go out on the bicycle
or we walk up and down hills. In the winter, I stay at home and
listen to music, or we go out to visit one of the many charming
little places in the Hudson valley.
3 - How and when did the idea of making Postfix start?
When I came to IBM research as a visiting scientist late 1996, I
had a little list of projects that I wanted to work on. One of
those was to build a mail system with the same quality as my TCP
Wrapper software: something that just does the job without causing
trouble, and that you can forget after you install it. At the time,
there were four CERT/CC advisories for Sendmail each year.
4 - Beyond Postfix, which projects do you develop or participate?
[see (1)]
5 - Which documentations would you recommend to someone who wants
to implement Postfix, with these following means: Anti-SPAN,
Anti-Virus, MySQL, authenticated SMTP and IMAP.
Every site has different needs. My goal is not to recommend any
specific product or configuration, but to make it possible for
Postfix users to choose what is best for their environment.
For this reason, Postfix uses standard protocols in order to
communicate with anti-spam or anti-virus software. Those protocols
are simple enough that inter-operability is not an issue. This way,
people have more choice; they aren't limited to solutions what work
with Postfix only.
For some sites an open source spam/virus solution is best, and for
other sites it is better to have a commercially supported solution.
Postfix does not care and plays nice with all of them, as long as
those solutions use standard protocols.
6 - Would you recommend any specific postfix configuration?
[see (5)]
7 - Tell me a little about postfix's future?
At the moment I am integrating widely used third-party support for
SMTP over TLS, and support for IP version 6 will follow in a month
or so. In the medium term, Postfix will adopt widely used standards
such as DSN (delivery status notification). I'm also looking into
the many proposals that have been made to authenticate mail such
as Microsoft's SenderID or Yahoo's domain keys.
8 - What do you think about other MTA's, namely Sendmail, QMail
and Exim, having stability and security in mind?
I recently saw draft designs for Sendmail version 10, and I noticed
many elements in the design that are familiar. I have no first-hand experience with the other MTAs and can't comment on their qualities.
9 - Why having one more MTA, since there are already Sendmail,
QMail, etc.
Indeed, one takes a grave responsibility when implementing yet
another mail system. It adds to the burden of system administrators
world-wide who have to care and feed the system until the end of
time.
When I started work on Postfix, there was a need for a known-to-be-secure
mail server. There were a lot of people who did not want to use
qmail for a variety of reasons. For these people, including myself,
Postfix was the mail system of choice.
10 - Which are the advantages of using postfix instead of QMail?
The main advantage is that Postfix evolves. While the designs are
similar (many small programs, each doing one job) there are also
fundamental differences (internally, qmail uses a parent-child
model while Postfix uses a client-server model).
Postfix has evolved over time, and went from 35 thousand lines of
code to 80 thousand lines, comments not included. A major challenge
is to maintain the integrity of the system while adding new
functionality. As a general rule, third-party patches don't have
the same quality as the official release; that is a disadvantage
for people who want to use qmail in today's environment.
11 - Which SPAM blockin tool and anti-virus would you recommend to
use along with postfix?
[See (5)]
12 - Advertisements are made, in general kindly to try convincing
the client to purchase the product. SPAM has been used massively
to advertise all sorts of products and this bother everyone,
contradicting advertisement's logic. Do you think SPAM brings any
benefit as an advertisement for those who use it, justifying its
raise. What's your opinion about internet's present and future,
considering the large amount of garbage and links overload caused
by SPAM?
Sending SPAM is cheap, therefore it is profitable even when only
a few people respond. And the better the anti-spam software becomes
over time, the more spam being is sent into the network.
Obviously, the solution is not better anti-spam technology, as that
only extends the time that we suffer the pain. The solution is to
have less spam on the network. One way to achieve this is to reduce
the number of systems that are allowed to send mail. According to
current measurements by spamhaus.org, some 70% of all the spam
comes via zombie programs that run on compromised personal computers.
13 - What do you think about proprietary anti-virus systems (F-Secure,
MailScan, BitDefender, etc) to use along with open-source MTAs,
since we have already free and open-source solutions, like Clamav,
Amavia, etc.?
[See (5)]
14 - What distribution do you use? Why did you choose it?
I have been using UNIX systems since 1985, and FreeBSD since 1993.
This is UNIX software that was ported to the PC environment late
in its life cycle. It is relatively mature compared to the software
that was written for PCs and that looks like UNIX.
15 - What did you think about Brazil, in times you have been to
here?
It looks like my trips abroad come in pairs; I was twice in Sweden
and twice in Japan last year, and this year I was twice in Brazil.
It is obvious that open source is very big in Brazil; and since
this is the largest country in a very large continent, it can have
a serious impact on developments in technology and non-technology.
16 - What's your opinion about Free software advance in Brazil?
[See (15)]
17 - Do you frequently visit any brazilian community web site?
I haven't learned Portugese yet, but I had the opportunity to learn
Latin and Greek in school, so I can sort-of read the language very,
very slowly. For this reason I visit Brazilian web sites only when
there is a need to do so.
18 - At last, what arguments would you use to persuade someone to
use Postfix, instead of another MTA?
Every MTA has a range or problems that it can solve well. Postfix
is designed to scale from small systems (personal laptop computer)
to very large (ISP's with tens of millions of mailboxes), but it
is not designed for extremely small systems, such as hand-held
devices. Given a choice, I prefer to do a smaller number of things
well, over trying to juggle too many balls at the same time.
Thanks for the interview. I'd be glad if you want to do any
commentary...
------ Fim do Email
Sem Mais,
» Comentário de CWagner () em 01/12 01:02
E tome teu leite e vai dormir, criança.
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