{"id":304,"date":"2016-09-03T20:47:00","date_gmt":"2016-09-03T20:47:00","guid":{"rendered":"http:\/\/www.gmass.co\/blog\/?p=304"},"modified":"2016-09-03T20:47:00","modified_gmt":"2018-07-11T05:24:56","slug":"what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means","status":"publish","type":"post","link":"https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/","title":{"rendered":"What the “An Error occurred, but the error response could not be deserialized” error means"},"content":{"rendered":"
If you’ve sent a Gmail mail merge campaign with GMass and were notified that this error was\u00a0generated while sending to your email addresses:<\/p>\n

An Error occurred, but the error response could not be deserialized<\/span><\/p>\n

you might be perplexed, since the error doesn’t provide any actionable information. This is an error that is generated by the Gmail API when GMass connects to your Gmail account to send your mail merge campaign. While there’s not much information available from Gmail as to the cause of this error, we’ve found that the usual cause is the user of large attachments or inline images<\/strong>.<\/p>\n

Gmail states that emails can be up to 25MB in size<\/a>, and GMass places a further size limit of 12MB per individual email message, but still, Gmail may generate this error even if you are under both of these limits. The solution is to simply reduce the size of your email, either by shrinking your inline images, host your images and refer to them relatively in your HTML code, or by reducing the size of or eliminating attachments.<\/p>\n

This Stack Overflow article<\/a> corroborates our theory about this error.<\/div>\n","protected":false},"excerpt":{"rendered":"

If you’ve sent a Gmail mail merge campaign with GMass and were notified that this error was\u00a0generated while sending to your email addresses: An Error occurred, but the\u2026<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3462],"tags":[],"class_list":["post-304","post","type-post","status-publish","format-standard","hentry","category-developers"],"acf":[],"yoast_head":"\r\nWhat the "An Error occurred, but the error response could not be deserialized" error means<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"What the "An Error occurred, but the error response could not be deserialized" error means\" \/>\r\n<meta property=\"og:description\" content=\"If you’ve sent a Gmail mail merge campaign with GMass and were notified that this error was\u00a0generated while sending to your email addresses: An Error occurred, but the\u2026\" \/>\r\n<meta property=\"og:url\" content=\"https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/\" \/>\r\n<meta property=\"og:site_name\" content=\"GMass Blog\" \/>\r\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/GmailMailMerge\/\" \/>\r\n<meta property=\"article:published_time\" content=\"2016-09-03T20:47:00+00:00\" \/>\r\n<meta property=\"article:modified_time\" content=\"2018-07-11T05:24:56+00:00\" \/>\r\n<meta name=\"author\" content=\"Ajay Goel\" \/>\r\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\r\n<meta name=\"twitter:creator\" content=\"@PartTimeSnob\" \/>\r\n<meta name=\"twitter:site\" content=\"@GMassForGmail\" \/>\r\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Ajay Goel\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\r\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\\\/\"},\"author\":{\"name\":\"Ajay Goel\",\"@id\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/#\\\/schema\\\/person\\\/b5fa74f8765b860701158fd77162fff8\"},\"headline\":\"What the “An Error occurred, but the error response could not be deserialized” error means\",\"datePublished\":\"2016-09-03T20:47:00+00:00\",\"dateModified\":\"2018-07-11T05:24:56+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\\\/\"},\"wordCount\":208,\"commentCount\":1,\"articleSection\":[\"Developers\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.gmass.co\\\/blog\\\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\\\/\",\"url\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\\\/\",\"name\":\"What the \\\"An Error occurred, but the error response could not be deserialized\\\" error means\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/#website\"},\"datePublished\":\"2016-09-03T20:47:00+00:00\",\"dateModified\":\"2018-07-11T05:24:56+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/#\\\/schema\\\/person\\\/b5fa74f8765b860701158fd77162fff8\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.gmass.co\\\/blog\\\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"What the “An Error occurred, but the error response could not be deserialized” error means\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/\",\"name\":\"GMass Blog\",\"description\":\"Tips and tricks for sending mail merge and mass email campaigns directly from Gmail\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/#\\\/schema\\\/person\\\/b5fa74f8765b860701158fd77162fff8\",\"name\":\"Ajay Goel\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/f3a70af05bbabe47925150d5a1320540e801b78055a74da20658fc97cd0706a2?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/f3a70af05bbabe47925150d5a1320540e801b78055a74da20658fc97cd0706a2?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/f3a70af05bbabe47925150d5a1320540e801b78055a74da20658fc97cd0706a2?s=96&d=mm&r=g\",\"caption\":\"Ajay Goel\"},\"description\":\"Ajay is the founder of GMass and has been developing email sending software for 20 years.\",\"sameAs\":[\"https:\\\/\\\/twitter.com\\\/PartTimeSnob\",\"https:\\\/\\\/x.com\\\/PartTimeSnob\"],\"url\":\"https:\\\/\\\/www.gmass.co\\\/blog\\\/author\\\/ajay-goel\\\/\"}]}<\/script>\r\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"What the \"An Error occurred, but the error response could not be deserialized\" error means","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/","og_locale":"en_US","og_type":"article","og_title":"What the \"An Error occurred, but the error response could not be deserialized\" error means","og_description":"If you’ve sent a Gmail mail merge campaign with GMass and were notified that this error was\u00a0generated while sending to your email addresses: An Error occurred, but the\u2026","og_url":"https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/","og_site_name":"GMass Blog","article_publisher":"https:\/\/www.facebook.com\/GmailMailMerge\/","article_published_time":"2016-09-03T20:47:00+00:00","article_modified_time":"2018-07-11T05:24:56+00:00","author":"Ajay Goel","twitter_card":"summary_large_image","twitter_creator":"@PartTimeSnob","twitter_site":"@GMassForGmail","twitter_misc":{"Written by":"Ajay Goel","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/#article","isPartOf":{"@id":"https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/"},"author":{"name":"Ajay Goel","@id":"https:\/\/www.gmass.co\/blog\/#\/schema\/person\/b5fa74f8765b860701158fd77162fff8"},"headline":"What the “An Error occurred, but the error response could not be deserialized” error means","datePublished":"2016-09-03T20:47:00+00:00","dateModified":"2018-07-11T05:24:56+00:00","mainEntityOfPage":{"@id":"https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/"},"wordCount":208,"commentCount":1,"articleSection":["Developers"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/","url":"https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/","name":"What the \"An Error occurred, but the error response could not be deserialized\" error means","isPartOf":{"@id":"https:\/\/www.gmass.co\/blog\/#website"},"datePublished":"2016-09-03T20:47:00+00:00","dateModified":"2018-07-11T05:24:56+00:00","author":{"@id":"https:\/\/www.gmass.co\/blog\/#\/schema\/person\/b5fa74f8765b860701158fd77162fff8"},"breadcrumb":{"@id":"https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.gmass.co\/blog\/what-the-an-error-occurred-but-the-error-response-could-not-be-deserialized-error-means\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.gmass.co\/blog\/"},{"@type":"ListItem","position":2,"name":"What the “An Error occurred, but the error response could not be deserialized” error means"}]},{"@type":"WebSite","@id":"https:\/\/www.gmass.co\/blog\/#website","url":"https:\/\/www.gmass.co\/blog\/","name":"GMass Blog","description":"Tips and tricks for sending mail merge and mass email campaigns directly from Gmail","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.gmass.co\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.gmass.co\/blog\/#\/schema\/person\/b5fa74f8765b860701158fd77162fff8","name":"Ajay Goel","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/f3a70af05bbabe47925150d5a1320540e801b78055a74da20658fc97cd0706a2?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/f3a70af05bbabe47925150d5a1320540e801b78055a74da20658fc97cd0706a2?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/f3a70af05bbabe47925150d5a1320540e801b78055a74da20658fc97cd0706a2?s=96&d=mm&r=g","caption":"Ajay Goel"},"description":"Ajay is the founder of GMass and has been developing email sending software for 20 years.","sameAs":["https:\/\/twitter.com\/PartTimeSnob","https:\/\/x.com\/PartTimeSnob"],"url":"https:\/\/www.gmass.co\/blog\/author\/ajay-goel\/"}]}},"_links":{"self":[{"href":"https:\/\/www.gmass.co\/blog\/wp-json\/wp\/v2\/posts\/304","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gmass.co\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gmass.co\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gmass.co\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gmass.co\/blog\/wp-json\/wp\/v2\/comments?post=304"}],"version-history":[{"count":1,"href":"https:\/\/www.gmass.co\/blog\/wp-json\/wp\/v2\/posts\/304\/revisions"}],"predecessor-version":[{"id":824,"href":"https:\/\/www.gmass.co\/blog\/wp-json\/wp\/v2\/posts\/304\/revisions\/824"}],"wp:attachment":[{"href":"https:\/\/www.gmass.co\/blog\/wp-json\/wp\/v2\/media?parent=304"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gmass.co\/blog\/wp-json\/wp\/v2\/categories?post=304"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gmass.co\/blog\/wp-json\/wp\/v2\/tags?post=304"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}