{"id":20230,"date":"2025-02-04T00:00:00","date_gmt":"2025-02-04T00:00:00","guid":{"rendered":"https:\/\/www.mailgun.com\/blog\/imap-vs-pop-2\/"},"modified":"2026-09-15T05:30:49","modified_gmt":"2026-09-15T05:30:49","slug":"imap-vs-pop","status":"publish","type":"blog","link":"https:\/\/www.mailgun.com\/de\/blog\/email\/imap-vs-pop\/","title":{"rendered":"IMAP vs. POP: Was ist der Unterschied?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">We\u2019ve talked about how email works and how email protocols facilitate the transfer of your emails along the way, from when you hit send to when your subscriber reads your email message. But before we dive into the differences between IMAP vs. POP email, we\u2019ll do a quick refresher on email protocols.<\/p>\n\r\n    <nav data-content-type=\"longform\" class=\"toc-block longform-spacings px-5 py-6 px-md-6 px-lg-7 py-md-7 bg-light fs-sm rounded-lg\" aria-labelledby=\"toc-title-1216\"><p class=\"h5 m-0\" id=\"toc-title-1216\">Inhaltsverzeichnis<\/p><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">01<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#what-are-email-protocols\">What are email protocols?<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">02<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#what-is-pop\">What is POP?<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">03<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#what-is-imap\">What is IMAP?<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">04<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#what-are-the-main-differences-between-imap-vs-pop\">What are the main differences between IMAP vs. POP?<\/a><a class=\"scrollme link-body-color\" href=\"#what-are-the-pros-and-cons-of-pop3\">What are the pros and cons of POP3?<\/a><a class=\"scrollme link-body-color\" href=\"#what-are-the-pros-and-cons-of-imap\">What are the pros and cons of IMAP?<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">05<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#pop-or-imap-when-to-use-them\">POP or IMAP: when to use them<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">06<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#final-thoughts\">Final thoughts<\/a><\/div><\/div><\/nav>\n<h2 class=\"wp-block-heading\">What are email protocols?<\/h2>\n\n<p class=\"wp-block-paragraph\">There are three types of email protocols:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Simple Mail Transfer Protocol (SMTP)<\/li>\n\n\n\n<li>Internet Message Access Protocol (IMAP)<\/li>\n\n\n\n<li>Post Office Protocol (POP)<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.mailgun.com\/de\/blog\/email\/unterschied-zwischen-smtp-und-api\/\" target=\"_tabs\" rel=\"noopener noreferrer\"><b>SMTP<\/b><\/a><b> handles the delivery of messages<\/b>. In other words, after you hit \u201csend\u201d in your email account the <a href=\"https:\/\/www.mailgun.com\/de\/blog\/email\/welchen-smtp-port-verwenden-die-ports-25-465-587-verstehen\/\" target=\"_tabs\" rel=\"noopener noreferrer\">SMTP protocol<\/a> transfers your message from your email client to your email service provider\u2019s (ESP\u2019s) sending mail server, like Mailgun\u2019s <b>SMTP server.<\/b> The SMTP protocol continues to carry your message to your subscriber\u2019s inbox service provider\u2019s (ISP\u2019s) receiving mail server and waits there until your subscriber reads your email.<\/p>\n\n<p class=\"wp-block-paragraph\">If SMTP handles the delivery,<b> POP and IMAP handle the retrieval of your email message<\/b> from your subscriber\u2019s mail server to their email client. When your subscriber fires up their email account, their email client, like Gmail, Yahoo, Microsoft Outlook, or AOL, will use POP or IMAP to download messages from the receiving mail server to their email client. The email client can be web-based, like Gmail.com, or app-based, like Microsoft Outlook.<\/p>\n\n<h2 class=\"wp-block-heading\">What is POP?<\/h2>\n\n<p class=\"wp-block-paragraph\"><b>POP (or POP3 to use its latest version) <\/b><a href=\"https:\/\/www.mailgun.com\/de\/resources\/learn\/glossary\/pop-server\/\" target=\"_tabs\" rel=\"noopener noreferrer\"><b>is an email protocol<\/b><\/a><b> that email clients use to retrieve emails from a mail server<\/b>. It uses an Internet Protocol (IP) to provide an email client access to a mailbox on a mail server. Then, POP downloads messages from the server to a single computer. <\/p>\n\n<p class=\"wp-block-paragraph\">How does POP3 work?:<\/p>\n\n<ol class=\"wp-block-list\">\n<li>Connects an email client to an email server<\/li>\n\n\n\n<li>Retrieves all messages from the email server<\/li>\n\n\n\n<li>Stores the messages on the client\u2019s local device or email client<\/li>\n\n\n\n<li>Deletes the original message from the mail server<\/li>\n<\/ol>\n\n<p class=\"wp-block-paragraph\">This is the default behavior. Sometimes, POP setups allow you to configure the protocol to leave a copy of the original message on the mail server.<\/p>\n\n<h2 class=\"wp-block-heading\">What is IMAP?<\/h2>\n\n<p class=\"wp-block-paragraph\">IMAP is a much more sophisticated protocol designed to address the shortcomings of POP. It supports many essential features for modern email usage, such as leaving messages on the server and accessing messages from multiple devices.<\/p>\n\n<p class=\"wp-block-paragraph\">How does IMAP work?:<\/p>\n\n<ol class=\"wp-block-list\">\n<li>Connects an email client to an email server<\/li>\n\n\n\n<li>Retrieves all messages from the email server<\/li>\n\n\n\n<li>Stores the messages on the client\u2019s local device or email client<\/li>\n\n\n\n<li>Keeps the original message on the mail server<\/li>\n<\/ol>\n\n<h2 class=\"wp-block-heading\">What are the main differences between IMAP vs. POP?<\/h2>\n\n<p class=\"wp-block-paragraph\">Both POP and IMAP protocols retrieve messages from your recipient\u2019s ISP\u2019s mail server.<\/p>\n\n<p class=\"wp-block-paragraph\">Both POP and IMAP protocols retrieve emails from a mail server, but they do this differently. IMAP synchronizes emails across multiple devices, allowing users to access their messages from anywhere, while POP downloads emails to a single device and deletes them from the server by default. This makes IMAP more suitable for users who need flexibility and accessibility, whereas POP is a simpler, more lightweight option for users who prefer to store their emails locally.<\/p>\n\n<h3 class=\"wp-block-heading\">What are the pros and cons of POP3?<\/h3>\n\n<p class=\"wp-block-paragraph\">Some advantages of POP3 are that it:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Backward compatible with servers that don\u2019t support IMAP<\/li>\n\n\n\n<li>Easy to implement across most major email clients<\/li>\n\n\n\n<li>Lightweight and straightforward to use<\/li>\n\n\n\n<li>Saves server space since old messages are deleted by default<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Some disadvantages of POP3 are that it:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Doesn\u2019t support encryption. This makes POP3 less secure than IMAP<\/li>\n\n\n\n<li>Can only be used to download messages from a server. This makes POP3 less flexible than IMAP<\/li>\n\n\n\n<li>Can be slow since it downloads all messages from the server each time<\/li>\n\n\n\n<li>Can take up a lot of local storage space since POP3 stores all messages locally<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">What are the pros and cons of IMAP?<\/h3>\n\n<p class=\"wp-block-paragraph\">Some advantages of IMAP are that it:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Allows you to keep your emails on the server so that you can access them from multiple devices, including your computer, mobile devices, and tablet<\/li>\n\n\n\n<li>Allows you to access your emails offline<\/li>\n\n\n\n<li>Facilitates searching for specific emails on your mail server<\/li>\n\n\n\n<li>Organizes your emails into folders<\/li>\n\n\n\n<li>Provides a secure way to access your email because your messages are stored on the mail server and not on your device<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">Some disadvantages of IMAP are that it:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Can be slow because it synchronizes the local mail client with the server, which can take some time depending on the size of the mailbox and the speed of the connection. IMAP generally uses more data than POP, contributing to slower speeds.<\/li>\n\n\n\n<li>Can be unreliable because it is a complex protocol that relies on several different technologies working together. Additionally, IMAP requires more storage space on the email server than POP, leading to problems if the server needs more space.<\/li>\n\n\n\n<li>Can use a lot of data because it constantly synchronizes the email server with the client, meaning that new emails, deleted emails, and any changes to existing emails are all downloaded to the client. This can use a significant amount of data, especially if there\u2019s a large volume of emails.<\/li>\n\n\n\n<li>Can be challenging to set up because it requires more complex server settings than POP.<\/li>\n\n\n\n<li>Isn\u2019t supported by all ESPs, which can make it difficult to use all of the features of the protocol<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">POP or IMAP: when to use them<\/h2>\n\n<p class=\"wp-block-paragraph\">IMAP supports all the essential features for modern email usage. But there are some situations where POP may be the better choice. Should you use POP vs. IMAP in Outlook? Let\u2019s take a look at when you should use each protocol.<\/p>\n\n<p class=\"wp-block-paragraph\">When should I use POP over IMAP?<\/p>\n\n<ul class=\"wp-block-list\">\n<li>When your subscriber\u2019s receiving mail server doesn\u2019t support IMAP<\/li>\n\n\n\n<li>When you only access email from a single device<\/li>\n\n\n\n<li>When your internet connection isn\u2019t consistent<\/li>\n\n\n\n<li>When you have limited server storage<\/li>\n<\/ul>\n\n<p class=\"wp-block-paragraph\">When should I use IMAP over POP?<\/p>\n\n<ul class=\"wp-block-list\">\n<li>When you need to access your email from multiple devices<\/li>\n\n\n\n<li>When you need to store a copy of the original email on the mail server<\/li>\n\n\n\n<li>When your ESP supports IMAP<\/li>\n\n\n\n<li>When your local storage is limited<\/li>\n\n\n\n<li>When you usually have a good internet connection<\/li>\n<\/ul>\n    <div data-content-type=\"longform\"  class=\"callout text-body-color px-5 py-6 px-md-6 px-lg-7 py-md-7 longform-spacings rounded-lg bg-light\" data-theme=\"light\">\r\n\r\n        <div class=\"content-body\"> If you\u2019re wanting to connect your POP or IMAP mailbox to Mailgun, you can use Routes to send email from our platform to an IMAP\/POP mailbox. We store the message body (3 days with paid accounts) and logs for those messages (30 days for paid accounts) so that our customers can pick them up through the API as the preferred method.<\/div>\r\n    <\/div>\r\n\t<div class=\"custom-video\">\r\n\t\t\t\t\t                    <div class=\"iframe-responsive-container lazy-video rounded-lg overflow-hidden \">\r\n                <a href=\"https:\/\/www.youtube.com\/watch?v=uGuz4_jqX9M\" class=\"lazy-video-link\" data-lazy-video=\"uGuz4_jqX9M\" target=\"_blank\" rel=\"nofollow\" role=\"button\" data-source=\"youtube\" data-language=\"de\" data-thumb=\"https:\/\/img.youtube.com\/vi\/uGuz4_jqX9M\/maxresdefault.jpg\" title=\"Sinch-Video\">\r\n                    <div class=\"btn btn-light btn-light-social btn-play btn-play-circle\">\r\n                                                    <svg aria-hidden=\"true\" data-url=\"https:\/\/www.mailgun.com\/wp-content\/plugins\/sinch-core\/assets\/icons\/sinch\/play.svg\"><\/svg>\r\n                                            <\/div>\r\n                    <img decoding=\"async\"  src=\"https:\/\/img.youtube.com\/vi\/uGuz4_jqX9M\/maxresdefault.jpg\" alt=\"Email Explained: What are routes?\">\r\n                <\/a>\r\n            <\/div>\r\n                        <script type=\"application\/ld+json\">\n            {\n    \"@context\": \"http:\/\/schema.org\",\n    \"@type\": \"VideoObject\",\n    \"@id\": \"https:\/\/www.youtube.com\/watch?v=uGuz4_jqX9M#VideoObject\",\n    \"thumbnailUrl\": \"https:\/\/img.youtube.com\/vi\/uGuz4_jqX9M\/maxresdefault.jpg\",\n    \"embedUrl\": \"https:\/\/www.youtube.com\/embed\/uGuz4_jqX9M\",\n    \"contentUrl\": \"https:\/\/www.youtube.com\/watch?v=uGuz4_jqX9M\",\n    \"name\": \"Email Explained: What are routes?\",\n    \"description\": \"Routing your emails automatically saves time and makes your inbound emails a lot easier. This week, Pat, one of Mailgun's Application Administrators, gives you the rundown on routes and how you can use them for your email strategy.\\n\\nUnderstanding the subtler points of email can be confusing, but we want to give you some clarity with Email Explained. In this series, we\\u2019ll be covering some common questions senders ask us in a way that helps anybody learn \\u2014 a big whiteboard.\\n\\nTwitter: https:\/\/twitter.com\/Mail_Gun \\nFacebook: https:\/\/www.facebook.com\/mailgun \\nLinkedIn: https:\/\/www.linkedin.com\/company\/mail... \\nWebsite: https:\/\/www.mailgun.com\/ \\nBlog: https:\/\/www.mailgun.com\/blog\",\n    \"uploadDate\": \"2019-03-28T19:19:11+00:00\",\n    \"duration\": \"PT3M41S\"\n}        <\/script>\n        \t\t\r\n\t\t\t<\/div>\r\n\r\n\t\r\n\n<h2 class=\"wp-block-heading\">Final thoughts<\/h2>\n\n<p class=\"wp-block-paragraph\">We\u2019d recommend IMAP over POP in most scenarios, IMAP supports remote access for multiple clients managing a single inbox. And long after its creation, this still aligns with how we need to use email.<\/p>\n\n<p class=\"wp-block-paragraph\">We hope we\u2019ve answered your questions on IMAP vs. POP but if you want to learn more about <a href=\"https:\/\/www.mailgun.com\/de\/blog\/email\/unterschied-zwischen-smtp-und-api\/\" target=\"_tabs\" rel=\"noopener noreferrer\">protocols,<\/a> how to <a href=\"https:\/\/www.mailgun.com\/de\/blog\/email\/tipps-erstellung-html-e-mails-workflows\/\" target=\"_tabs\" rel=\"noopener noreferrer\">improve your workflow<\/a>, and other niche email topics, don\u2019t forget to subscribe to our newsletter.<\/p>\n    <div data-content-type=\"longform\" class=\"longform-spacings\">\r\n        <div class=\"cta bg-primary rounded-lg px-5 py-6 p-md-7 px-md-6\">\r\n                    <div class=\"form-subscription\">\r\n                            <div class=\"h4 mb-3\">\r\n                    Keep me posted! Get great resources in your inbox every week.                <\/div>\r\n                                    <form accept-charset=\"UTF-8\" action=\"\" enctype=\"multipart\/form-data\" data-form-subscription method=\"POST\" style=\"max-width: 400px;\">\r\n                <div class=\"row justify-content-between align-items-top g-2\">\r\n                    <div class=\"col-10\">\r\n                        <input type=\"email\" name=\"email\" class=\"form-control\" placeholder=\"Email\" autocomplete=\"email\" required>\r\n                        <div data-fs=\"error\" role=\"alert\" class=\"invalid-feedback\">\r\n                            Please complete this required field.                        <\/div>\r\n                    <\/div>\r\n                                            <div class=\"col-12 order-last mt-3 fs-xxs\" data-fs=\"acceptance\" style=\"display:none;\">\r\n                            \r\n                                <div class=\"form-check\">\r\n                                    <input id=\"formSubscriptionAcceptance-terms-3485\" class=\"form-check-input\"\r\n                                        type=\"checkbox\" name=\"terms\">\r\n                                    <label for=\"formSubscriptionAcceptance-terms-3485\" class=\"form-check-label text-body-color\">\r\n                                        Ich habe die Servicebedingungen gelesen und stimme ihnen zu.                                        <span class=\"hs-form-required\">*<\/span>\r\n                                    <\/label>\r\n                                <\/div>\r\n\r\n                            \r\n                                <div class=\"form-check\">\r\n                                    <input id=\"formSubscriptionAcceptance-privacy-8527\" class=\"form-check-input\"\r\n                                        type=\"checkbox\" name=\"privacy\">\r\n                                    <label for=\"formSubscriptionAcceptance-privacy-8527\" class=\"form-check-label text-body-color\">\r\n                                        Ich habe die Datenschutzerkl\u00e4rung gelesen und bin damit einverstanden.                                        <span class=\"hs-form-required\">*<\/span>\r\n                                    <\/label>\r\n                                <\/div>\r\n\r\n                                                    <\/div>\r\n                    \r\n                                            <div class=\"col-12 order-last fs-xxs mb-0 mt-2 text-body-color\">\r\n                            Send me the Mailjet Newsletter. I expressly agree to receive the newsletter and know that I can easily unsubscribe at any time.                        <\/div>\r\n                    \r\n                    <div class=\"col-2\">\r\n                        <button type=\"submit\" value=\"Submit\" aria-label=\"Submit\" class=\"btn btn-secondary btn-icon\">\r\n                            <svg aria-hidden=\"true\" data-url=\"https:\/\/www.mailgun.com\/wp-content\/plugins\/sinch-core\/assets\/icons\/layout\/chevron-right.svg\"><\/svg>\r\n                        <\/button>\r\n                    <\/div>\r\n                <\/div>\r\n\r\n                <input type=\"hidden\" name=\"formSubscriptionRecaptchaToken\" data-fs=\"recaptcha-token\">\r\n                <input type=\"hidden\" name=\"customListID\" value=\"\">\r\n\r\n            <\/form>\r\n            <div data-fs=\"message-success\" style=\"display: none;\">\r\n                <p class=\"mb-0 mt-2 text-body-color\">\r\n                    Check your inbox monthly for your Mailjet Newsletter!                <\/p>\r\n            <\/div>\r\n        <\/div>\r\n        <\/div>\r\n    <\/div>\r\n","protected":false},"excerpt":{"rendered":"<p>IMAP und POP sind nur zwei Methoden, um auf E-Mails zuzugreifen. In diesem Artikel kl\u00e4ren wir die Unterschiede zwischen POP und IMAP. Anschlie\u00dfend sehen wir uns einige Vor- und Nachteile an und beleuchten, welches dieser Protokolle f\u00fcr Sie am besten geeignet sein k\u00f6nnte.<\/p>\n","protected":false},"author":13,"featured_media":4074,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"blog_category":[20],"class_list":["post-20230","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-email"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>POP vs. IMAP-E-Mail-Protokolle: Was ist der Unterschied? - Transactional Email API Service For Developers | Mailgun<\/title>\n<meta name=\"description\" content=\"IMAP vs. POP: Erfahren Sie die Hauptunterschiede zwischen diesen E-Mail-Protokollen, ihre Vor- und Nachteile und welches am besten f\u00fcr Sie geeignet ist.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mailgun.com\/de\/blog\/email\/imap-vs-pop\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"POP vs. IMAP-E-Mail-Protokolle: Was ist der Unterschied? 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