{"id":7741,"date":"2023-05-31T15:09:05","date_gmt":"2023-05-31T12:09:05","guid":{"rendered":"https:\/\/snov.io\/knowledgebase\/?p=7741"},"modified":"2025-11-14T17:50:09","modified_gmt":"2025-11-14T14:50:09","slug":"what-is-a-valid-email-address-format","status":"publish","type":"post","link":"https:\/\/snov.io\/knowledgebase\/what-is-a-valid-email-address-format\/","title":{"rendered":"What is a valid email address format"},"content":{"rendered":"<p>The key to reaching inboxes is using valid email addresses. In this article, we'll explore the factors that determine email validity and how to perform <a href=\"https:\/\/snov.io\/email-verifier\" target=\"_blank\" rel=\"noopener\">email verification<\/a>.<\/p>\n<p><strong><span style=\"font-size: 14pt;\"><a href=\"#what_makes_email_valid\">What makes an email address valid:<\/a><\/span><\/strong><\/p>\n<ul>\n<li><a href=\"#email_address_format\">Factor #1: Email address format<\/a><\/li>\n<li><a href=\"#email_address_authentication\">Factor #2: Email address authentication<\/a><\/li>\n<\/ul>\n<p><strong><a href=\"#how_to_check_if_an_email_is_valid\"><span style=\"font-size: 14pt;\">How to check if an email address is valid:<\/span><\/a><\/strong><\/p>\n<ul>\n<li><a href=\"#single_email_verification\">Method #1: Single email verification<\/a><\/li>\n<li><a href=\"#bulk_email_verification\">Method #2: Bulk email verification<\/a><\/li>\n<\/ul>\n<h2 id=\"what_makes_email_valid\">What makes an email address valid<\/h2>\n<p><span style=\"color: #000000;\">What determines the validity of an email? Let's dig deeper into the factors that define a valid email address.<\/span><\/p>\n<h3 style=\"border-radius: 10px; background-color: #fcf8cf; padding: 10px; border: 1px solid #F2DA91;\"><span style=\"color: #c89c1b;\">Factor #1: Email address format<br \/>\n<\/span><\/h3>\n<p>A valid email address consists of two main components: the username and the domain name.<\/p>\n<p><span style=\"font-weight: 400;\">Username (before @) identifies the email address user with a unique name. <\/span>Domain name (after @) represents the email provider or organization hosting the email account.<\/p>\n<p>So, a valid email address follows the format: <strong>username@domain.com<\/strong>. However, there are specific requirements for acceptable usernames and domain formats.<\/p>\n<table style=\"width: 100.897%; border-color: #c7c7c7; height: 653px;\" border=\"1\" cellspacing=\"5\" cellpadding=\"5\">\n<tbody>\n<tr style=\"height: 24px;\">\n<th style=\"width: 17.3115%; height: 24px;\">Component<\/th>\n<th style=\"width: 51.9884%; height: 24px;\">Syntax requirements<\/th>\n<th style=\"width: 66.5337%; height: 24px;\">Valid email format examples<\/th>\n<\/tr>\n<tr style=\"height: 286px;\">\n<td style=\"width: 17.3115%; height: 286px;\">Username<\/td>\n<td style=\"width: 51.9884%; height: 286px;\">Allowed characters:<\/p>\n<ul>\n<li>latin letters (a-z).<\/li>\n<li>numbers (0-9).<\/li>\n<li>special characters: underscores (_), periods (.), and dashes (-).<\/li>\n<\/ul>\n<p>A period (.) is not permitted at the start or end.<\/p>\n<p>Consecutive periods or special characters (e.g., john...doe@company.com) are not allowed.<\/p>\n<p>Special characters should be followed by one or more letters or numbers.<\/td>\n<td style=\"width: 66.5337%; height: 286px;\">j-doe1234@domain.com<\/p>\n<p>sarah.smith85@domain.com<\/p>\n<p>jessy_luther@domain.com<\/p>\n<p>my.email123@domain.com<\/p>\n<p>sales@domain.com<\/td>\n<\/tr>\n<tr style=\"height: 152px;\">\n<td style=\"width: 17.3115%; height: 152px;\">Domain name<\/td>\n<td style=\"width: 51.9884%; height: 152px;\">Consists of one or more parts separated by a dot.<\/p>\n<p>The second part must be at least two characters, for example: .com, .org, .cc<\/p>\n<p>Allowed characters:<\/p>\n<ul>\n<li>latin letters (a-z)<\/li>\n<li>numbers (0-9)<\/li>\n<li>dashes (-), excluding the use of dashes at the beginning or end.<\/li>\n<\/ul>\n<\/td>\n<td style=\"width: 66.5337%; height: 152px;\">&nbsp;<\/p>\n<p>username@domain.org<\/p>\n<p>username@mail-provider.cc<\/p>\n<p>username@example.net<\/p>\n<p>username@companywebsite.com<\/p>\n<p>username@techcompany.com<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div><\/div>\n<h3 style=\"border-radius: 10px; background-color: #fcf8cf; padding: 10px; border: 1px solid #F2DA91;\"><span style=\"color: #c89c1b;\">Factor #2: Email address authentication<br \/>\n<\/span><\/h3>\n<p>Not all email addresses that are correctly formatted are automatically considered valid. The most important factor is that the email address actually exists and is active on the mail server.<\/p>\n<p>This is confirmed through authentication, a process that ensures the email address is legitimate and verifies its existence on the mail server.<\/p>\n<p>It involves checking the email address by verifying its domain through MX records and authenticating the email account using SMTP server commands to confirm its active status and ability to receive emails.<\/p>\n<h2 id=\"how_to_check_if_an_email_is_valid\"><strong><span style=\"font-size: 18pt;\">How to check if an email address is valid<\/span><\/strong><\/h2>\n<p>There are few methods to check the validity of an email depending on the number of emails you need to verify.<\/p>\n<h3 style=\"border-radius: 10px; background-color: #cffcd1; padding: 10px; border: 1px solid #7ACC7E;\"><span style=\"color: #66b86a;\">Method 1: Single Email Verification<\/span><\/h3>\n<p>This method is suitable for you if you only need to verify one or a few emails.<\/p>\n<ul>\n<li><strong>Send a test email manually:<\/strong><\/li>\n<\/ul>\n<p>You can verify an email by sending a message to it from your email client and checking if it bounces back or delivered successfully.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-block-image shadow aligncenter wp-image-25281\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2023\/05\/2023-06-01_19-47-52.jpg\" alt=\"\" width=\"900\" height=\"450\" srcset=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2023\/05\/2023-06-01_19-47-52.jpg 1920w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2023\/05\/2023-06-01_19-47-52-300x150.jpg 300w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2023\/05\/2023-06-01_19-47-52-1024x513.jpg 1024w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2023\/05\/2023-06-01_19-47-52-768x384.jpg 768w, https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2023\/05\/2023-06-01_19-47-52-1536x769.jpg 1536w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/p>\n<ul>\n<li><strong><a href=\"https:\/\/app.snov.io\/verify\/individual-emails\" target=\"_blank\" rel=\"noopener\">Use single email verification form<\/a>:<\/strong><\/li>\n<\/ul>\n<p>You can enter an email address into the verification form and see its status without the need to manually send an email. This method prevents any potential harm to your sender reputation.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-block-image shadow aligncenter\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2022\/07\/2023-05-31_14-46-58.jpg\" alt=\"\" width=\"901\" height=\"451\" \/><\/p>\n<h3 style=\"border-radius: 10px; background-color: #cffcd1; padding: 10px; border: 1px solid #7ACC7E;\"><span style=\"color: #66b86a;\">Method 2: Bulk Email Verification<\/span><\/h3>\n<p>This method lets you to check multiple emails at once or verify a large number of emails by uploading a list.<\/p>\n<p>Our <a href=\"https:\/\/snov.io\/bulk-email-verifier\" target=\"_blank\" rel=\"noopener\">bulk email verifier<\/a> can help you run verification checks on your entire email list in bulk and remove any invalid addresses from your list.<\/p>\n<p><a href=\"https:\/\/app.snov.io\/bulk-email-verification\" target=\"_blank\" rel=\"noopener\"><strong>Use bulk email verifier \u21d2<\/strong><\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-block-image shadow aligncenter\" src=\"https:\/\/snov.io\/knowledgebase\/wp-content\/uploads\/2022\/07\/2023-05-31_14-44-33.jpg\" alt=\"\" width=\"923\" height=\"462\" \/><\/p>\n<p>It includes syntax checks, MX record checks, SMTP authentication, and other tests for maximum verification accuracy.<\/p>\n<p><span style=\"font-weight: 400;\">Learn more in our guide on <a href=\"https:\/\/snov.io\/knowledgebase\/how-to-use-the-bulk-email-verification-tool\/\" target=\"_blank\" rel=\"noopener\">how to verify a list of email addresses with Snov.io.<\/a><\/span><\/p>\n<h2>Read next:<\/h2>\n<p>Keeping your email list clean helps minimize the number of bounces you get, improve your sender reputation and deliverability.<\/p>\n<p>If you're facing high bounce rates and poor lead quality, we have a solution for you outlined in our <a href=\"https:\/\/growth.snov.io\/high-bounce-rate\/\" target=\"_blank\" rel=\"noopener\">Sales Cheats<\/a> resource - a complete roadmap on how to fix the most common problems in the sales process and improve your outreach results.<\/p>\n<p>Our <a href=\"https:\/\/snov.io\/email-finder\" target=\"_blank\" rel=\"noopener\">email finder<\/a> tools help you find accurate, pre-verified emails and build lists for your campaigns.<\/p>\n<p>Once you have a list of valid emails, you can create personalized <a href=\"https:\/\/snov.io\/outreach-campaigns\" target=\"_blank\" rel=\"noopener\">multichannel campaigns<\/a> to reach your potential clients.<\/p>\n<p><a href=\"https:\/\/snov.io\/knowledgebase\/how-to-create-a-drip-campaign-step-by-step\/\" target=\"_blank\" rel=\"noopener\">Read how to create and launch a multichannel campaign --&gt;<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The key to reaching inboxes is using valid email addresses. In this article, we&#8217;ll explore the factors that determine email validity and how to perform email verification. What makes an email address valid: Factor #1: Email address format Factor #2: Email address authentication How to check if an email address is valid: Method #1: Single [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"_links":{"self":[{"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/posts\/7741"}],"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=7741"}],"version-history":[{"count":1,"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/posts\/7741\/revisions"}],"predecessor-version":[{"id":43261,"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/posts\/7741\/revisions\/43261"}],"wp:attachment":[{"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/media?parent=7741"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/categories?post=7741"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/snov.io\/knowledgebase\/wp-json\/wp\/v2\/tags?post=7741"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}