it-systeme

christoph ender it operations · networking · software development

about

Hi there! These pages are intended to share notes and experiences from my work as an IT freelancer – yes, you can hire me – working in OPs, networking and development.
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contact

mobile: +49 (0)171 1592365
e-mail: christoph.ender@it-sys-ce.de
pgp: 0fe1e446f585711c3d56d45154f51a402f3c6660 2f3c6660
mastodon: @chrender@mastodon.social

latest blog entry: “postfix sni cert storage”

A few days ago I got a warning from my monitoring system indicating that some certificates for my postfix mail system would expire soon. This caught me a little bit by surprise, since this is a certificate issued and auto-renewed by Let's Encrypt and it has been working flaslessly so far for everyting else.

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