{"id":1756,"date":"2026-03-16T11:13:46","date_gmt":"2026-03-16T11:13:46","guid":{"rendered":"https:\/\/lineo.es\/blog-desarrollo-web\/"},"modified":"2026-04-02T07:39:28","modified_gmt":"2026-04-02T07:39:28","slug":"web-development-blog","status":"publish","type":"page","link":"https:\/\/lineo.es\/en\/web-development-blog\/","title":{"rendered":"Blog"},"content":{"rendered":"\t\t
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Here you\u2019ll find articles about the world of web development.<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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\n\t\t\t\n\t\t\t\tThrottling outbound emails with Mailman & Exim\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t
\n\t\t\t\t\t\n\t\t\tMarch 25, 2018\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t
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Many ISPs have limits on the amount of emails received in a period of time, not respecting this will reduce the reputation of the sender. Mailman 2 doesn\u2019t support throttling, though there\u2019re some patches in the wild adding this feature. Exim supports rate limiting incoming emails, but not emails going out, though it may be possible to do this with<\/p>\n\t\t<\/div>\n\t\t\n\t\t\n\t\t\tLeer m\u00e1s \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t

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\n\t\t\t\n\t\t\t\tThe system-ui font\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t
\n\t\t\t\t\t\n\t\t\tJanuary 31, 2017\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t
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Imagine: font-family: system-ui, sans-serif; Enabled by default in Chrome 56,\u00a0system-ui\u00a0is a special font name, that tells Chrome to use the system font (be it\u00a0Cantarell\u00a0in Gnome,\u00a0San Francisco\u00a0in macOS, etc.) But system-ui is something new, as far as I know available only in the latest versions of Blink based browsers. So what to do as of today? This is from Bootstrap 4:<\/p>\n\t\t<\/div>\n\t\t\n\t\t\n\t\t\tLeer m\u00e1s \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t

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\n\t\t\t\n\t\t\t\tHTTP Strict Transport Security (HSTS)\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t
\n\t\t\t\t\t\n\t\t\tJanuary 30, 2017\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t
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Just learned about HSTS and started using it. First let me explain HSTS with my own words. Scenario without hsts: The user types the domain name in the URL bar without the protocol, such as \u201cexample.com\u201d, and the browser automatically adds the \u201chttp:\/\/\u201d prefix. This first request is vulnerable to Man In The Middle (MITM) attacks. The server replies with<\/p>\n\t\t<\/div>\n\t\t\n\t\t\n\t\t\tLeer m\u00e1s \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t

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\n\t\t\t\n\t\t\t\tBackup MX for Mailman, with Exim\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t
\n\t\t\t\t\t\n\t\t\tFebruary 28, 2013\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t
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This week a hard disk from one of my servers broke. It has been replaced with just 3 minutes of downtime (kudos to\u00a0OVH), and right now the RAID array is being rebuilt. Since this is the first time this happens to me, and the server is running a production mailman service, I decided to take my time and set-up a\u00a0backup<\/p>\n\t\t<\/div>\n\t\t\n\t\t\n\t\t\tLeer m\u00e1s \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t

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\n\t\t\t\n\t\t\t\tPython: Running Valgrind on a C extension\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t
\n\t\t\t\t\t\n\t\t\tDecember 23, 2012\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t
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This is how I use\u00a0Valgrind\u00a0to check for memory bugs in\u00a0pygit2. Glibc with debug symbols The first issue I run into is that Valgrind refused to work if\u00a0Glibc\u00a0was not compiled with debug symbols. This is how I did in my\u00a0Gentoo\u00a0notebook, I edited the \/etc\/portage\/make.conf file to enable the\u00a0splitdebug\u00a0feature: \/etc\/portage\/make.conf FEATURES=”${FEATURES} splitdebug compressdebug -nostrip” Then re-emerged the glibc: $ sudo emerge glibc<\/p>\n\t\t<\/div>\n\t\t\n\t\t\n\t\t\tLeer m\u00e1s \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t

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\n\t\t\t\n\t\t\t\tGentoo: How to debug Exim\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t
\n\t\t\t\t\t\n\t\t\tDecember 23, 2012\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t
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If you have some problem with exim, and the logs are not enough, edit the\u00a0\/etc\/conf.d\/exim\u00a0file, and add the debugging option (-d): \/etc\/conf.d\/exim # Command-line options for running exim EXIM_OPTS=”-bd -q15m -d” Then restart exim: # \/etc\/init.d\/exim restart The exim daemon will not be detached from the console, the debug information will be printed to the standard output.\u00a0Good luck!<\/p>\n\t\t<\/div>\n\t\t\n\t\t\n\t\t\tLeer m\u00e1s \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t

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\n\t\t\t\n\t\t\t\tGentoo: Mailman with Nginx & Exim\t\t\t<\/a>\n\t\t<\/h3>\n\t\t\t\t
\n\t\t\t\t\t\n\t\t\tJuly 16, 2012\t\t<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t
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This is how I installed\u00a0Mailman\u00a0in a\u00a0Gentoo\u00a0server, using\u00a0Nginx\u00a0as the web server and\u00a0Exim\u00a0as the MTA. Mailman By default Mailman runs with the Apache user and group. First step is to configure Mailman so it runs with the Nginx user and group. To do so edit \/etc\/make.conf and add these lines: \/etc\/make.conf MAILMAN_CGIUID=”nginx” MAILMAN_CGIGID=”nginx” Now you can go ahead and emerge Mailman. Next<\/p>\n\t\t<\/div>\n\t\t\n\t\t\n\t\t\tLeer m\u00e1s \u00bb\t\t<\/a>\n\n\t\t\t\t<\/div>\n\t\t\t\t<\/article>\n\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Here you\u2019ll find articles about the world of web development.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-1756","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/lineo.es\/en\/wp-json\/wp\/v2\/pages\/1756","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lineo.es\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/lineo.es\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/lineo.es\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lineo.es\/en\/wp-json\/wp\/v2\/comments?post=1756"}],"version-history":[{"count":37,"href":"https:\/\/lineo.es\/en\/wp-json\/wp\/v2\/pages\/1756\/revisions"}],"predecessor-version":[{"id":2155,"href":"https:\/\/lineo.es\/en\/wp-json\/wp\/v2\/pages\/1756\/revisions\/2155"}],"wp:attachment":[{"href":"https:\/\/lineo.es\/en\/wp-json\/wp\/v2\/media?parent=1756"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}