{"id":91889,"date":"2026-09-08T12:10:22","date_gmt":"2026-09-08T12:10:22","guid":{"rendered":"https:\/\/mailrelay.com\/case-study\/teatro-caser-calderon\/"},"modified":"2026-09-08T12:10:22","modified_gmt":"2026-09-08T12:10:22","slug":"teatro-caser-calderon","status":"publish","type":"case-study","link":"https:\/\/mailrelay.com\/en\/case-study\/teatro-caser-calderon\/","title":{"rendered":"Teatro Caser Calder\u00f3n"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1414\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2022\/05\/teatrocasercalderon-big.jpg\" alt=\"Teatro Caser Calder\u00f3n\" width=\"950\" height=\"250\"><\/p>\n<h3>Placing their account on an outbound route according to the quality of their subscriber base (a high-reputation IP certified by the leading ISPs) allowed them to leave behind any delivery problems and improve their email marketing results.<\/h3>\n<p><a title=\"Teatro Caser Calder\u00f3n Case Study\" href=\"\/downloads\/casos-exito-email-marketing\/mailrelay-caso-exito-teatro-caser-calderon.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1326\" src=\"https:\/\/mailrelay.com\/wp-content\/uploads\/2022\/05\/unnamed-file.pdf-61.png\" alt=\"pdf\" width=\"25\" height=\"25\"><\/a> <a title=\"Teatro Caser Calder\u00f3n\" href=\"\/downloads\/casos-exito-email-marketing\/mailrelay-caso-exito-teatro-caser-calderon.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Download the case study in PDF<\/a><\/p>\n<h3>Key Points<\/h3>\n<ul>\n<li>Subscriber management<\/li>\n<li>Detailed statistics<\/li>\n<li>Not being flagged as spam<\/li>\n<\/ul>\n<h3>About Teatro Caser Calder\u00f3n<\/h3>\n<p>Located in the heart of Madrid, where Atocha Street meets Plaza de Jacinto Benavente, the Teatro Caser Calder\u00f3n is one of the most iconic and beautiful buildings in the city center, both for its exterior architecture and its interior d\u00e9cor.<\/p>\n<p>It originally opened its doors on June 18, 1917, under the name Teatro Ode\u00f3n. A year later it became known as Teatro del Centro, and it wasn&#8217;t until 1927 that it was renamed Teatro Calder\u00f3n.<\/p>\n<p>In 2007, the theater was renamed H\u00e4agen-Dazs Calder\u00f3n, and from 2012 onward it changed its name again to Teatro Caser Calder\u00f3n.<\/p>\n<p>It has hosted, and continues to host, successful national and international musicals, from Carmen, Carmen (1988), Hello Dolly (2001), and We Will Rock You (Queen) (2003), to The Hole (2011-2012)\u2026<\/p>\n<p>Today, it has become a club where you can enjoy a drink or dinner while watching a show, in a modern and unique venue in the center of Madrid.<\/p>\n<h3>Objectives<\/h3>\n<p>For its email marketing campaigns, the Teatro Caser Calder\u00f3n team knew exactly what they needed: a way to create and send newsletters in less time than before, since composing them, sending them out, and analyzing the results was taking up a great deal of their time.<\/p>\n<p>With the change of email marketing provider, they needed a secure and effective newsletter platform that would let them track the activity of each newsletter once it had been delivered to recipients&#8217; inboxes.<\/p>\n<p>Having several databases built through different channels \u2014 direct subscription, press promotions, etc. \u2014 meant some contacts risked appearing in more than one database, leading to duplicate sends and extra costs. This is resolved by using Mailrelay and its duplicate control feature.<\/p>\n<h3>Actions Taken<\/h3>\n<p>To ensure their emails were properly delivered, they were provided with all the technical configurations needed on their mail and domain servers, achieving an optimal sender reputation.<\/p>\n<p>That, combined with placing their account on an outbound route according to the quality of their subscriber base (a high-reputation IP certified by the leading ISPs), allowed them to leave behind any delivery problems.<\/p>\n<p>Mailrelay&#8217;s team reviewed their newsletter designs to ensure they ran no risk of being flagged as spam, since Hotmail and Gmail&#8217;s strict rules can mistakenly mark legitimate emails as spam due to poor design.<\/p>\n<h3>Results<\/h3>\n<p>Using Mailrelay has allowed the Teatro Caser Calder\u00f3n to clean up duplicate and outdated email addresses without having to take any action on the different subscriber lists they manage. Simply by using the automatic cleanup system for invalid\/duplicate emails (available in every Mailrelay account) and by making it easy for users who lose interest in the newsletters to remove themselves from the subscriber base, without any intervention required from the Teatro Caser Calder\u00f3n staff.<\/p>\n<p>Now they can measure, beyond any doubt, the effectiveness of each of their email marketing sends (Who opens it? Which shows are of most interest to each subscriber? What computer, mobile, or tablet was used to read the newsletter? What geographic location is the subscriber in when they open the newsletter? etc.)<\/p>\n<p><strong>With Mailrelay, every email marketing campaign we run is correctly delivered to each of our subscribers&#8217; inboxes, quickly and easily. At the same time, all the information the system provides allows us to improve our future newsletters, as well as keep our database up to date and free of outdated emails. Right now, it&#8217;s an essential tool for communicating effectively with the subscribers on our lists.<\/strong><\/p>\n<p><em>Jes\u00fas Ca\u00f1adilla,<\/em><\/p>\n<p><em>Email Marketing Manager.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Placing their account on an outbound route according to the quality of their subscriber base (a high-reputation IP certified by the leading ISPs) allowed them to leave behind any delivery problems and improve their email marketing results. Download the case study in PDF Key Points Subscriber management Detailed statistics Not being flagged as spam About [&hellip;]<\/p>\n","protected":false},"featured_media":49551,"template":"","class_list":["post-91889","case-study","type-case-study","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Teatro Caser Calder\u00f3n - Mailrelay<\/title>\n<meta name=\"description\" content=\"Placing their account on an outbound route according to the quality of their subscriber base\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mailrelay.com\/en\/case-study\/teatro-caser-calderon\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Teatro Caser Calder\u00f3n - 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Download the case study in PDF Key Points Subscriber management Detailed statistics Not being flagged as spam About&hellip;","_links":{"self":[{"href":"https:\/\/mailrelay.com\/en\/wp-json\/wp\/v2\/case-study\/91889","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mailrelay.com\/en\/wp-json\/wp\/v2\/case-study"}],"about":[{"href":"https:\/\/mailrelay.com\/en\/wp-json\/wp\/v2\/types\/case-study"}],"version-history":[{"count":0,"href":"https:\/\/mailrelay.com\/en\/wp-json\/wp\/v2\/case-study\/91889\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mailrelay.com\/en\/wp-json\/wp\/v2\/media\/49551"}],"wp:attachment":[{"href":"https:\/\/mailrelay.com\/en\/wp-json\/wp\/v2\/media?parent=91889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}