Author Archives: Christophe Wolfhugel

About Christophe Wolfhugel

Christophe Wolfhugel, who is an integral part of the EMEA team and based in London, has been involved with mail systems, particularly Sendmail, since 1990. He has designed and deployed complex messaging infrastructures for major customers in the industry and banking sectors across Europe and the U.S. Prior work experience gained Christophe expertise not only on applications, but also with large enterprise IP networks. During the 1990s, Christophe co-founded the first French professional ISP, Oléane, which was subsequently acquired by France Télécom. There, he designed his first large email platform with opensource sendmail. He has also worked as a Network and Systems Engineer at Institut Pasteur, and as a security consultant for HSC, where he implemented Sendmail-based email filtering. Follow me on Twitter: @cwolfhugel.

Easy use of Sendmail Premium Reporting

The other day I needed to get some statistics while visiting a customer about how many accounts could eventually have compromised passwords. The first thing I needed to consider is how to determine if an account has been compromised. Our … Continue reading

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Improving STARTTLS authentication in the Sendmail MTA

After having worked on what I think is the right way to setup X.509 certificates for use in SMTP STARTTLS transactions (see my previous blog entry here), I am continuing my work on how we can improve the way the … Continue reading

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Creating the right Certificates for STARTTLS use in SMTP

Recently I have been playing  around with STARTTLS, SMTP & Enforcement of STARTTLS policy. This has led me to make several suggestions for evolutions on the way the sendmail open source MTA should handle this enforcement – I will address … Continue reading

Posted in Christophe Wolfhugel, Email Security, Open source | 1 Comment

To Greylist or Not to Greylist?

I’ve been thinking a lot about Greylisting lately and a post by Rogers Cadenhead in Watching the Watchers on alternative methods of stopping spammers (more on this below) got my mind going even more. Now, please bear with me as … Continue reading

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EMEA User Conference: Using Nagios

In today’s environment, not only must an email system do its job by routing adequately and efficiently our customers’ messages, but it must also come with a practical and widely accepted way for being monitored. Sendmail’s approach in this is … Continue reading

Posted in Christophe Wolfhugel, Uncategorized | Tagged | 2 Comments