{"id":222,"date":"2026-04-29T13:55:58","date_gmt":"2026-04-29T10:55:58","guid":{"rendered":"https:\/\/snov.io\/knowledgebase\/?p=222"},"modified":"2026-04-30T11:44:17","modified_gmt":"2026-04-30T08:44:17","slug":"how-to-verify-emails","status":"publish","type":"post","link":"https:\/\/snov.io\/knowledgebase\/how-to-verify-emails\/","title":{"rendered":"How to prepare for cold outreach with verification and warm-up"},"content":{"rendered":"<div style=\"position: relative; padding-bottom: calc(56.59863945578232% + 41px); height: 0; width: 100%;\"><iframe style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%; color-scheme: light;\" title=\"Introduction to Email Verifier\" src=\"https:\/\/demo.arcade.software\/4MPzsU6FvJj7s3E6Bdlb?embed&amp;embed_mobile=tab&amp;embed_desktop=inline&amp;show_copy_link=true\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" loading=\"lazy\"><\/iframe><\/div>\n<p>This guide shows how to prepare your contact lists and email accounts before cold outreach in Snov.io. Proper setup helps you avoid spam folders, reduce bounces, and get more replies from your campaigns.<\/p>\n<nav>\n<ul>\n<li><a href=\"#verify-contact-list\">Verify your contact list to reduce bounces<\/a><\/li>\n<li><a href=\"#connect-email-accounts\">Connect email accounts for mailbox rotation<\/a><\/li>\n<li><a href=\"#start-warm-up\">Start warm-up to improve deliverability<\/a><\/li>\n<li><a href=\"#daily-sending-limits\">Manage account sending limits<\/a><\/li>\n<\/ul>\n<\/nav>\n<h2 id=\"verify-contact-list\"><strong>Verify your contact list<\/strong><\/h2>\n<p>To send safely, start by verifying your contact list and removing risky emails.<\/p>\n<p>If you're using contacts from your own database or another platform, check individual emails, upload a file for bulk verification, or verify imported lists inside your account.<\/p>\n<div class=\"notification-block learn\">\n<div class=\"notification-block__icon\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/themes\/knowledgebase-n\/assets\/img\/fluent_chat-warning-16-regular.svg\" alt=\"learn\" width=\"32\" height=\"32\" \/><\/div>\n<div class=\"notification-block__text\">Snov.io checks whether an address can receive emails and helps you clean your list from risky and invalid contacts. Each checked email costs <strong>1 credit<\/strong> from your <a href=\"https:\/\/app.snov.io\/pricing-plans\" target=\"_blank\" rel=\"noopener\">account balance<\/a>.<\/div>\n<\/div>\n<h3><strong>Verify emails in bulk<\/strong><\/h3>\n<p>If you already have a list, upload it and verify it in bulk. This is the fastest and most common option.<\/p>\n<p>Open <a href=\"https:\/\/app.snov.io\/bulk-email-verification\" target=\"_blank\" rel=\"noopener\">Bulk Email Verification<\/a>, upload your file, map the email column, and start verification. It supports <strong>CSV<\/strong> or <strong>TXT<\/strong> files and can verify up to <strong>100,000 emails<\/strong> per upload.<\/p>\n<h3><strong>Verify emails one by one<\/strong><\/h3>\n<p>Use <a href=\"https:\/\/app.snov.io\/verify\/individual-emails\" target=\"_blank\" rel=\"noopener\">Single Email Verification<\/a> to check individual contacts. If the email is valid, you can add it to your list.<\/p>\n<h3><strong>Import a contact list and verify it<\/strong><\/h3>\n<p>On the <a href=\"https:\/\/app.snov.io\/prospects\" target=\"_blank\" rel=\"noopener\">Prospects<\/a> page, click <strong>Add prospects<\/strong> and choose <strong>Import from file<\/strong>.<\/p>\n<p>Upload your file and map the columns to the correct fields. For email sending, include at least the contact\u2019s <strong>name<\/strong> and <strong>email address<\/strong>.<\/p>\n<p>After the import is complete, open the list and click <strong>Verify emails<\/strong>.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/Prospects-04-29-2026_02_08_PM.png\" loading=\"lazy\" \/><\/p>\n<h2><strong>Clean the list<\/strong><\/h2>\n<p>After verification, review your list using email statuses:<\/p>\n<ul>\n<li><strong>Valid (green):<\/strong> safe to send<\/li>\n<li><strong>Unverifiable (yellow):<\/strong> may work but carries higher risk<\/li>\n<li><strong>Invalid (red):<\/strong> excluded automatically and won\u2019t be included in your campaigns<\/li>\n<\/ul>\n<p>Check how many unverifiable emails you have:<\/p>\n<ul>\n<li><strong>5% or less:<\/strong> safe to send<\/li>\n<li><strong>More than 5%:<\/strong> clean your list before launch<\/li>\n<\/ul>\n<div class=\"notification-block tip\">\n<div class=\"notification-block__icon\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/themes\/knowledgebase-n\/assets\/img\/academicons_ideas-repec.svg\" alt=\"tip\" width=\"32\" height=\"32\" \/><\/div>\n<div class=\"notification-block__text\">To reduce bounce risk, remove emails from catch-all domains. Hover over the status icon to see details and understand <a href=\"https:\/\/snov.io\/knowledgebase\/email-statuses\/\">why an address is marked as yellow<\/a>.<\/div>\n<\/div>\n<div><img decoding=\"async\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/Prospects-04-29-2026_07_51_PM.png\" loading=\"lazy\" \/><\/div>\n<h2 id=\"connect-email-accounts\"><strong>Set up email sender accounts<\/strong><\/h2>\n<p>Once your list is ready, prepare the sender accounts you will use for sending. Using properly set up accounts helps you avoid spam filters and scale outreach safely.<\/p>\n<p>Go to <a href=\"https:\/\/app.snov.io\/account\/email-account\" target=\"_blank\" rel=\"noopener\">Email Accounts<\/a> to connect or create your sending mailboxes.<\/p>\n<ul>\n<li>connect your own <strong>Gmail<\/strong> or <strong>Outlook<\/strong> accounts with one-click sign-in<\/li>\n<li>connect other providers using <strong>SMTP\/IMAP<\/strong><\/li>\n<li>import multiple accounts at once using <strong>CSV<\/strong><\/li>\n<li>add <strong>done-for-you domains and mailboxes<\/strong><\/li>\n<\/ul>\n<div class=\"notification-block learn\">\n<div class=\"notification-block__icon\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/themes\/knowledgebase-n\/assets\/img\/fluent_chat-warning-16-regular.svg\" alt=\"learn\" width=\"32\" height=\"32\" \/><\/div>\n<div class=\"notification-block__text\">To send safely at scale, connect multiple mailboxes and <a href=\"https:\/\/snov.io\/knowledgebase\/how-to-use-mailbox-rotation-to-increase-sending-limit\/\" target=\"_blank\" rel=\"noopener\">use mailbox rotation<\/a> to distribute sending and avoid overloading a single account.<\/div>\n<\/div>\n<h3><strong>Add multiple sender accounts from CSV<\/strong><\/h3>\n<p>Use <a href=\"https:\/\/snov.io\/knowledgebase\/how-to-import-email-sender-accounts\/\" target=\"_blank\" rel=\"noopener\">Import from CSV<\/a> to connect multiple sender accounts at once.<\/p>\n<p>Upload a CSV file with account credentials and provider settings, and Snov.io will set up the accounts automatically.<\/p>\n<p>CSV import supports accounts that use <strong>SMTP\/IMAP<\/strong> settings and lets you add up to <strong>100 email accounts per import<\/strong>. If you use Gmail or Outlook accounts, connect them with direct sign-in instead of CSV import. <a href=\"https:\/\/snov.io\/knowledgebase\/connect-your-mailbox\/\" target=\"_blank\" rel=\"noopener\">Read the guide on connecting accounts.<\/a><\/p>\n<h3><strong>Done-for-you mailboxes<\/strong><\/h3>\n<p>Besides connecting your existing accounts, Snov.io also offers done-for-you domains and mailboxes. With this option, you can buy domains and create new email sender accounts directly from your dashboard.<\/p>\n<p>This option is useful if you don\u2019t have existing sender accounts or want to scale outreach faster without manual setup.<\/p>\n<p>Every account comes fully configured with SPF, DKIM, DMARC, and tracking domains \u2014 no setup required on the provider\u2019s side.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-46250 wp-block-image shadow\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_10_23_AM.png\" alt=\"\" width=\"1680\" height=\"848\" srcset=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_10_23_AM.png 1680w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_10_23_AM-300x151.png 300w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_10_23_AM-1024x517.png 1024w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_10_23_AM-768x388.png 768w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_10_23_AM-1536x775.png 1536w\" sizes=\"(max-width: 1680px) 100vw, 1680px\" \/><\/p>\n<h2 id=\"start-warm-up\"><strong>Add accounts to warm-up<\/strong><\/h2>\n<p>Before sending any campaign, <a href=\"https:\/\/snov.io\/knowledgebase\/snov-io-email-warm-up-tool\/\" target=\"_blank\" rel=\"noopener\">warm up your email accounts<\/a> to improve deliverability. During warm-up, your accounts send and receive emails with other real mailboxes, helping build sender reputation and improve inbox placement.<\/p>\n<div class=\"notification-block tip\">\n<div class=\"notification-block__icon\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/themes\/knowledgebase-n\/assets\/img\/academicons_ideas-repec.svg\" alt=\"tip\" width=\"32\" height=\"32\" \/><\/div>\n<div class=\"notification-block__text\">Start warm-up right after connecting new accounts. You can launch warm-up for multiple mailboxes in one click. Both existing and done-for-you mailboxes should be warmed up before starting campaigns.<\/div>\n<\/div>\n<p>You can start warm-up in two ways: automatic (quick launch) or manual setup with advanced settings.<\/p>\n<h3><strong>Quick warm-up launch<\/strong><\/h3>\n<p>Quick launch automatically selects the optimal preset for each account: gradual ramp-up or fixed daily warm-up.<\/p>\n<p>Go to <a href=\"https:\/\/app.snov.io\/account\/email-account\" target=\"_blank\" rel=\"noopener\">Email Accounts<\/a> and click <strong>Quick launch<\/strong> under <strong>Warm-up<\/strong>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-45881 wp-block-image shadow\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-22-2026_11_35_AM.png\" alt=\"\" width=\"1680\" height=\"842\" srcset=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-22-2026_11_35_AM.png 1680w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-22-2026_11_35_AM-300x150.png 300w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-22-2026_11_35_AM-1024x513.png 1024w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-22-2026_11_35_AM-768x385.png 768w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-22-2026_11_35_AM-1536x770.png 1536w\" sizes=\"(max-width: 1680px) 100vw, 1680px\" \/><\/p>\n<p>To launch warm-up in bulk, select accounts in the <a href=\"https:\/\/app.snov.io\/account\/email-account\" target=\"_blank\" rel=\"noopener\">Email Accounts<\/a> list and click <strong>Start warm-up<\/strong> in the top panel.<\/p>\n<p>Make sure you have available warm-up slots in your plan. The number of accounts you can warm up at the same time <a href=\"https:\/\/snov.io\/knowledgebase\/warm-up-slots-and-warm-up-volume-limits\/\" target=\"_blank\" rel=\"noopener\">depends on your plan<\/a>.<\/p>\n<p>Check how deliverability improves on the <a href=\"https:\/\/app.snov.io\/deliverability\/\" target=\"_blank\" rel=\"noopener\">warm-up dashboard<\/a>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-46249 wp-block-image shadow\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_10_10_AM.png\" alt=\"\" width=\"1680\" height=\"848\" srcset=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_10_10_AM.png 1680w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_10_10_AM-300x151.png 300w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_10_10_AM-1024x517.png 1024w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_10_10_AM-768x388.png 768w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_10_10_AM-1536x775.png 1536w\" sizes=\"(max-width: 1680px) 100vw, 1680px\" \/><\/p>\n<h2 id=\"daily-sending-limits\"><strong>Daily sending limits<\/strong><\/h2>\n<p>Snov.io applies safe default limits automatically, but you can adjust them in <a href=\"https:\/\/app.snov.io\/account\/email-account\" target=\"_blank\" rel=\"noopener\">email account settings<\/a>.<\/p>\n<div class=\"notification-block learn\">\n<div class=\"notification-block__icon\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/themes\/knowledgebase-n\/assets\/img\/fluent_chat-warning-16-regular.svg\" alt=\"learn\" width=\"32\" height=\"32\" \/><\/div>\n<div class=\"notification-block__text\">The sending limit directly affects deliverability. Sending too many emails per day is one of the main reasons accounts get flagged as spam.<\/div>\n<\/div>\n<p>Recommended limit is up to <strong>50 emails per day per account<\/strong> (campaign emails + warm-up combined).<\/p>\n<p>Warm-up emails do not count toward the limit in your account settings, but they do count toward the total volume your mailbox sends per day.<\/p>\n<div class=\"notification-block tip\">\n<div class=\"notification-block__icon\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/themes\/knowledgebase-n\/assets\/img\/academicons_ideas-repec.svg\" alt=\"tip\" width=\"32\" height=\"32\" \/><\/div>\n<div class=\"notification-block__text\">Even during campaigns, keep part of your daily limit for warm-up. For example, split the limit like this: 40 emails\/day for campaigns, 10 emails\/day for warm-up.<\/div>\n<\/div>\n<p><a href=\"https:\/\/snov.io\/knowledgebase\/email-sending-limits\/\">Read more about managing account limits.<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-46252 wp-block-image shadow\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_11_34_AM.png\" alt=\"\" width=\"1680\" height=\"848\" srcset=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_11_34_AM.png 1680w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_11_34_AM-300x151.png 300w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_11_34_AM-1024x517.png 1024w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_11_34_AM-768x388.png 768w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2026\/04\/My-account-04-30-2026_11_34_AM-1536x775.png 1536w\" sizes=\"(max-width: 1680px) 100vw, 1680px\" \/><\/p>\n<div class=\"notification-block note-gray\">\n<div class=\"notification-block__text\">\n<h3>Related articles<\/h3>\n<p><a href=\"https:\/\/snov.io\/knowledgebase\/connect-your-mailbox\/\">How to add and manage email accounts<\/a><br \/>\n<a href=\"https:\/\/snov.io\/knowledgebase\/how-to-use-email-warm-up-tips-and-advice-for-best-results\/\">How to set up Email Warm-up<\/a><br \/>\n<a href=\"https:\/\/snov.io\/knowledgebase\/email-verifier-faqs\/\">FAQ \u2013 Email Verifier<\/a><br \/>\n<a href=\"https:\/\/snov.io\/knowledgebase\/faq-email-warm-up\/\">FAQ \u2013 Email Warm-up<\/a><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>This guide shows how to prepare your contact lists and email accounts before cold outreach in Snov.io. Proper setup helps you avoid spam folders, reduce bounces, and get more replies from your campaigns. Verify your contact list to reduce bounces Connect email accounts for mailbox rotation Start warm-up to improve deliverability Manage account sending limits [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"_links":{"self":[{"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/posts\/222"}],"collection":[{"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/comments?post=222"}],"version-history":[{"count":24,"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/posts\/222\/revisions"}],"predecessor-version":[{"id":46253,"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/posts\/222\/revisions\/46253"}],"wp:attachment":[{"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/media?parent=222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/categories?post=222"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/tags?post=222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}