{"id":59351,"date":"2021-11-09T09:30:31","date_gmt":"2021-11-09T08:30:31","guid":{"rendered":"https:\/\/blog.salesflare.com\/cold-outreach-email-subject-lines"},"modified":"2025-10-13T21:16:40","modified_gmt":"2025-10-13T19:16:40","slug":"cold-outreach-email-subject-lines","status":"publish","type":"post","link":"https:\/\/blog.salesflare.com\/zh\/\u51b7\u542f\u52a8\u7535\u5b50\u90ae\u4ef6\u4e3b\u9898\u884c","title":{"rendered":"\u6211\u4eec\u5982\u4f55\u64b0\u5199\u51b7\u51b0\u51b0\u7684\u7535\u5b50\u90ae\u4ef6\u4e3b\u9898\u884c\uff0c\u83b7\u5f97\u51b7\u51b0\u51b0\u7684\u7ed3\u679c"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><h1>How We Write Cold Email Subject Lines That Get Cold Hard Results<\/h1>\n<h2 class=\"h2-subheader\">A guest blog by Will Cannon (Founder &amp; CEO of UpLead)<\/h2>\n<p class=\"translation-block\">Writing cold emails that get opened, let alone convert, is very challenging, simply because you\u2019re sending those to strangers. Without an established relationship with your cold targets, it\u2019s easy to get frustrated: there\u2019s zero feedback and your emails are usually sent to the spam folder.<\/p>\n<p class=\"translation-block\">There are a lot of factors that influence the success of your cold emails. Arguably the most important is the subject line. It directly influences the open rate, click-through rate, as well as conversion. That\u2019s why you must ensure your subject lines are of high quality. \ud83e\udd47<\/p>\n<p class=\"translation-block\">In this article, we\u2019ll cover:<\/p>\n<ul>\n<li class=\"translation-block\">The role subject lines play in your <u><a href=\"https:\/\/blog.salesflare.com\/cold-email-outreach-startups\">cold email outreach<\/a><\/u><\/li>\n<li class=\"translation-block\">4+ best practice examples that are backed by data<\/li>\n<\/ul>\n<p class=\"translation-block\">Ready? Let\u2019s get started. \ud83d\udc47<\/p>\n<hr>\n<h2 id=\"cp7nt\">Role of Subject Lines in Your Cold Email Campaigns<\/h2>\n<p class=\"translation-block\">Subject lines play an important role in any email campaign, warm or cold. They\u2019re the first impression of your emails; it\u2019s the first thing your targets see of them. When they open up their inbox, they judge what you\u2019ve sent them based on the subject line you\u2019ve written.<\/p>\n<p class=\"translation-block\">Subject lines are more essential for cold email, simply due to the impersonal nature of emailing strangers. You must also consider that the people you\u2019re targeting aren\u2019t on your email list. This means that, when targeting US citizens, the CAN-SPAM Act is especially important. \u26a0\ufe0f<\/p>\n<p class=\"translation-block\">If you didn\u2019t know, the CAN-SPAM Act is a law that governs the rules surrounding commercial email, especially <u><a href=\"https:\/\/blog.salesflare.com\/send-mass-email\">bulk emailing<\/a><\/u>. Regarding email subject lines, the law specifically states:<\/p>\n<blockquote><p class=\"translation-block\">Don\u2019t use deceptive subject lines. The subject line must accurately reflect the content of the message.<\/p><\/blockquote>\n<figure class=\"image strchf-type-image regular strchf-size-regular strchf-align-center\"><img decoding=\"async\" src=\"https:\/\/images.storychief.com\/account_481\/image3_a88831b2e996750f38704ffb415c86e6_800.png\"><\/figure>\n<p class=\"translation-block\">Even though The CAN-SPAM Act is for both warm and cold emailing, it\u2019s probably more significant for cold. Most <u><a href=\"https:\/\/www.onehourprofessor.com\/best-email-marketing-software-services\/\">email marketing tools<\/a><\/u> for <a href=\"https:\/\/instantly.ai\/blog\/how-to-warmup-email-domain\/\">warm emailing<\/a> have safeguards in place to warn you of these types of mistakes, but <a href=\"https:\/\/snov.io\/blog\/how-to-write-cold-emails\/\">cold email<\/a> platforms typically don\u2019t. This is something to seriously consider whenever you send prospective sales\/marketing emails to targeted strangers.<\/p>\n<p><strong class=\"translation-block\">Put simply:<\/strong> It is important to have a list of <u><a href=\"https:\/\/wiza.co\/blog\/verify-an-email-address\/\">valid email addresses<\/a><\/u> for your cold email outreach and the goal of a subject line is for it to get the target\/reader to open the email. This is emphasized in importance with cold emailing.<\/p>\n<hr>\n<h2 id=\"etv6t\">4+ Subject Line Best Practices (Backed by Science)<\/h2>\n<p class=\"translation-block\">Below, you\u2019ll find 4+ different best practice strategies you can use to improve the subject lines of <u><a href=\"https:\/\/blog.salesflare.com\/cold-emails\">your cold emails<\/a><\/u>. Each will include some real, visual examples; that\u2019ll help you understand how to effectively implement them.<\/p>\n<p><strong class=\"translation-block\">NOTE:<\/strong> You won\u2019t be able to use all of these together at once. Some of them are appropriate for certain emails and contexts, where others are not. Consider all of the strategies outlined below as tools in your toolbelt.<\/p>\n<h3 id=\"80csk\">1. Personalize Your Email Subject Lines<\/h3>\n<p class=\"translation-block\">Did you know that emails with <u><a href=\"https:\/\/www.invespcro.com\/blog\/email-subject-lines-statistics-and-trends\/\">personalized subject lines have a 22.2% greater chance of being opened<\/a><\/u>? This isn\u2019t surprising in the least: personalizing your email subject lines makes them far more effective; warm or cold.<\/p>\n<p class=\"translation-block\">But why is this? \ud83e\udd14<\/p>\n<p class=\"translation-block\">People love to hear or read their own names, or at least something personal to them. It was Dale Carnegie \u2014 author of <em>How to Win Friends and Influence People<\/em> \u2014 who once said:<\/p>\n<blockquote><p class=\"translation-block\">A person\u2019s name is to that person, the sweetest, most important sound in any language.<\/p><\/blockquote>\n<p class=\"translation-block\">Does it need any more explanation than that? If you received two emails with identical subject lines, except for using your name, which one would you open first? Exactly: personalization works because\u2026 it\u2019s personal \u2014 and so is email messaging.<\/p>\n<p class=\"translation-block\">So, how do you personalize your email subject lines? There are several different methods you could try, including the most obvious: simply using their name. Here\u2019s a list of ideas you can potentially use:<\/p>\n<ul>\n<li class=\"translation-block\">Use their first name or full name<\/li>\n<li class=\"translation-block\">Use the name of the company they work for<\/li>\n<li class=\"translation-block\">Use their job title<\/li>\n<\/ul>\n<p class=\"translation-block\">How personal you can get will be limited to the data you have on them. A good contact database\/list will help you <u><a href=\"https:\/\/www.uplead.com\/company-research-tools\/\">find relevant information<\/a><\/u>.<\/p>\n<p class=\"translation-block\">To personalize a step further, you could search them up on LinkedIn. It could tell you that they attended a conference, event, or workshop. It could also tell you what articles they\u2019ve read, liked, or even written. If they\u2019ve got social media profiles, check them out.<\/p>\n<p class=\"translation-block\">If implemented correctly, here\u2019s how it could look:<\/p>\n<figure class=\"image strchf-type-image regular strchf-size-regular strchf-align-center\"><img decoding=\"async\" src=\"https:\/\/images.storychief.com\/account_481\/image9_22e72ec659e8bd6dd0ca6512c3a9d10a_800.png\"><\/figure>\n<h3 id=\"ekmtc\">2. Keep Your Email Subject Lines Short<\/h3>\n<p class=\"translation-block\">Another tactic you can use to supercharge your cold email subject lines is to simply keep them short\u2026 no, really: that\u2019s it. Sometimes less is more, and often this is the case when it comes to subject lines for emails.<\/p>\n<p class=\"translation-block\">An email subject line \u2014 warm or cold \u2014 that\u2019s too long will fail to catch your intended target\u2019s attention. This is primarily because of 2 reasons:<\/p>\n<ul>\n<li class=\"translation-block\">They often get cut off past a certain character length<\/li>\n<li class=\"translation-block\">They\u2019re long winded and unfocused<\/li>\n<\/ul>\n<p class=\"translation-block\">On the other hand, shorter subject lines are specific, focused on a particular point or intended goal. They also never get cut off, which is a huge plus. \ud83d\udc4c<\/p>\n<p class=\"translation-block\">So, how <em>short<\/em> exactly, is ideal? After all, it\u2019s a rather vague term: what\u2019s too long, too short, and just right? Well, there\u2019s not an <em>exact<\/em> number; all subject titles are different: they\u2019re promoting a unique email about a specific topic.<\/p>\n<p class=\"translation-block\">Too long is anything that gets cut off. What\u2019s the point if they can\u2019t see it? Too short is one that doesn\u2019t get the message off you intended. Why even send the email if you\u2019re not effectively telling them what it\u2019s about?<\/p>\n<p class=\"translation-block\">For what it\u2019s worth, there was <u><a href=\"https:\/\/www.invespcro.com\/blog\/email-subject-lines-statistics-and-trends\/\">a study done on email subject line length and open rates<\/a><\/u>. These were the results:<\/p>\n<ul>\n<li class=\"translation-block\">0-5 words = 16% open rate<\/li>\n<li class=\"translation-block\">6-10 words = 21% open rate<\/li>\n<li class=\"translation-block\">11-15 words = 14% open rate<\/li>\n<li class=\"translation-block\">16-20 words = 12% open rate<\/li>\n<li class=\"translation-block\">21-25 words = 9% open rate<\/li>\n<\/ul>\n<p class=\"translation-block\">6-10 words length is the winner; I wouldn\u2019t read too much into it, though. As stated before: each email is unique and requires a unique subject line. 0-15 words length will cover just about everything, but make sure to see if the subject line cuts off. Send it to yourself to check this out.<\/p>\n<p><strong class=\"translation-block\">NOTE:<\/strong> Also consider that the character length, not just the word length, is important. This is what determines the visual length of a subject line in an inbox, and if it gets cut off. Screen size and browser zoom can influence this. \ud83d\udd0d<\/p>\n<p class=\"translation-block\">If done correctly, here\u2019s how it could look:<\/p>\n<figure class=\"image strchf-type-image regular strchf-size-regular strchf-align-center\"><img decoding=\"async\" src=\"https:\/\/images.storychief.com\/account_481\/image1_4bc6ec49f21ad956037bbaca46617317_800.png\"><\/figure>\n<p class=\"translation-block\">If done incorrectly, here\u2019s how it could look:<\/p>\n<figure class=\"image strchf-type-image regular strchf-size-regular strchf-align-center\"><img decoding=\"async\" src=\"https:\/\/images.storychief.com\/account_481\/image6_d6a732c6b16342373f8be8001ecdc632_800.png\"><\/figure>\n<h3 id=\"bg5vj\">3. Use Urgency in Your Email Subject Lines<\/h3>\n<p class=\"translation-block\">Another strategy you can use to improve your cold email subject lines is to add some urgency. This is when you add something like \u2018limited supplies,\u2019 or \u2018while stocks last.\u2019<\/p>\n<p class=\"translation-block\">What this does is tap into a psychological phenomenon known as FOMO: the fear of missing out. People don\u2019t like it when they let an opportunity pass them by; nobody wants to be the odd one out. In fact, <u><a href=\"https:\/\/eventbrite-s3.s3.amazonaws.com\/marketing\/Millennials_Research\/Gen_PR_Final.pdf\">according to research<\/a><\/u>, nearly 70% of millennials state they experience FOMO. \ud83d\ude27<\/p>\n<p class=\"translation-block\">By putting some urgency in your cold email subject lines, you\u2019re forcing them into action. Incentivizing them to click and open. The research backs this up: <u><a href=\"https:\/\/www.invespcro.com\/blog\/email-subject-lines-statistics-and-trends\/\">a report found urgency-laced subject lines could increase email open rate by 22%<\/a><\/u>.<\/p>\n<p class=\"translation-block\">However, make sure you don\u2019t go overboard. If too many of your emails use urgency, it kind of defeats itself. Think of urgency as a curveball you can throw now and again to catch them off guard. For cold emailing, though, you probably won\u2019t have this problem.<\/p>\n<p class=\"translation-block\">Here are some real-life examples of subject lines using the power of urgency:<\/p>\n<figure class=\"image strchf-type-image regular strchf-size-regular strchf-align-center\"><img decoding=\"async\" src=\"https:\/\/images.storychief.com\/account_481\/image7_cc5a6e8eee66822b9307a97fea6f4f9f_800.png\"><\/figure>\n<h3 id=\"5te64\">4. Use Social Proof in Your Email Subject Lines<\/h3>\n<p class=\"translation-block\">Adding social proof to your cold email subject lines is another psychological trick you can use. Much like the urgency tactic, social proof plays mind games with your intended targets. This is when you mention something that socially validates your brand.<\/p>\n<p class=\"translation-block\">Examples include:<\/p>\n<ul>\n<li class=\"translation-block\">Referencing how many customers you have<\/li>\n<li class=\"translation-block\">Referencing testimonials<\/li>\n<li class=\"translation-block\">Referencing case studies<\/li>\n<li class=\"translation-block\">Referencing celebrity\/authority\/credibility endorsements<\/li>\n<\/ul>\n<p class=\"translation-block\">It works because people are influenced by what others do, say, and think. We naturally try to uncover whether something is credible or not: social proof helps us do so. When your cold email target sees your subject line mentioning your massive customer base, they\u2019re impressed. \ud83d\ude32<\/p>\n<p class=\"translation-block\">Here is a real-life example: this was an email promoting a video case study.<\/p>\n<figure class=\"image strchf-type-image regular strchf-size-regular strchf-align-center\"><img decoding=\"async\" src=\"https:\/\/images.storychief.com\/account_481\/image5_b97b6667dd64a1862cb924b67d258ee9_800.png\"><\/figure>\n<p class=\"translation-block\">Here\u2019s another one: an email promoting a free guide from an SEO authority figure.<\/p>\n<figure class=\"image strchf-type-image regular strchf-size-regular strchf-align-center\"><img decoding=\"async\" src=\"https:\/\/images.storychief.com\/account_481\/image4_ce2f5b8f77267dd6d0880e6279cf93f5_800.png\"><\/figure>\n<p class=\"translation-block\">Here\u2019s an email about another case study.<\/p>\n<figure class=\"image strchf-type-image regular strchf-size-regular strchf-align-center\"><img decoding=\"async\" src=\"https:\/\/images.storychief.com\/account_481\/image2_d9b2255c1ef3da2271966cc1c8de61cd_800.png\"><\/figure>\n<p class=\"translation-block\">And lastly, here\u2019s an email from Adam Enfroy that uses both urgency and social proof for his course on <u><a href=\"https:\/\/www.adamenfroy.com\/how-to-start-a-blog\">how to start a blog<\/a><\/u>.<\/p>\n<figure class=\"image strchf-type-image regular strchf-size-regular strchf-align-center\"><img decoding=\"async\" src=\"https:\/\/images.storychief.com\/account_481\/image8_a14f5bf3a0dd0dd19cdbffa585c1bfd1_800.png\"><\/figure>\n<hr>\n<h2 id=\"85fc3\">Conclusion<\/h2>\n<p class=\"translation-block\">The subject line of an email, cold or hot, can make or break it: whether it\u2019s successful or not. It directly influences the open rate, click-through rate, and conversion as well.<\/p>\n<p class=\"translation-block\">Cold email outreach is not an easy endeavor. The number of emails sent that get opened is typically quite low. Most don\u2019t even reach the inbox: they end up in the spam folder. Others land in the \u201cPromotions\u201d or \u201cOther\u201d folder. \ud83d\udcc2<\/p>\n<p class=\"translation-block\">However, with the right subject line, you can significantly improve your odds. Consider utilizing the information and best practice examples outlined in this article; we hope you find it of value.<\/p>\n<p class=\"translation-block\">Got any questions? Don\u2019t hesitate to leave us a comment or hit us up on the chat on our website.<\/p>\n<hr>\n<p><em class=\"translation-block\"><strong>A little about Will:<br>\n<\/strong>Will Cannon is a seasoned email marketer and founded UpLead, a <a href=\"https:\/\/blog.salesflare.com\/lead-generation-tools\">B2B lead generation software<\/a>. He knows a thing (or two) about great cold emails and loves to share his knowledge.<\/em><\/p>\n<hr>\n<p>\n    <figure class=\"image strchf-type-image regular strchf-size-regular strchf-align-center\">\n      <a href=\"https:\/\/salesflare.com\">\n        <picture>\n          <source \n            srcset=\"https:\/\/lib.salesflare.com\/images\/sf-blog-footer-transparent-800.avif 1x, \n                    https:\/\/lib.salesflare.com\/images\/sf-blog-footer-transparent-1600.avif 2x\" \n            type=\"image\/avif\" \/>\n          <source \n            srcset=\"https:\/\/lib.salesflare.com\/images\/sf-blog-footer-transparent-800.png 1x, \n                    https:\/\/lib.salesflare.com\/images\/sf-blog-footer-transparent-1600.png 2x\" \n            type=\"image\/png\" \/>\n          <img decoding=\"async\" \n            src=\"https:\/\/lib.salesflare.com\/images\/sf-blog-footer-transparent-800.png\" \n            srcset=\"https:\/\/lib.salesflare.com\/images\/sf-blog-footer-transparent-800.png 1x, \n                    https:\/\/lib.salesflare.com\/images\/sf-blog-footer-transparent-1600.png 2x\" \n            alt=\"Try Salesflare's CRM\" \/>\n        <\/picture>\n      <\/a>\n    <\/figure><br>\n<em class=\"translation-block\">We hope you liked this post. If you did, spread the word!<\/em><\/p>\n<p>\ud83d\udc49<em> You can follow @salesflare on<\/em> <em><u><a href=\"https:\/\/twitter.com\/salesflare\">Twitter<\/a><\/u><\/em>, <em><u><a href=\"https:\/\/www.facebook.com\/salesflare\/\">Facebook<\/a><\/u><\/em> <em>and<\/em> <em class=\"translation-block\"><u><a href=\"https:\/\/www.linkedin.com\/company\/salesflare\">LinkedIn<\/a><\/u>.<\/em><\/p>\n<p class=\"translation-block\">[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>\u8bd5\u8bd5\u8fd9\u4e9b\u884c\u4e4b\u6709\u6548\u7684\u7535\u5b50\u90ae\u4ef6\u4e3b\u9898\u884c\uff0c\u4ee5\u63d0\u9ad8\u51b7\u95e8\u7535\u5b50\u90ae\u4ef6\u7684\u6253\u5f00\u7387\u548c\u8f6c\u5316\u7387\u3002<\/p>","protected":false},"author":1,"featured_media":59353,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"wl_entities_gutenberg":"","_crdt_document":"","footnotes":""},"categories":[128],"tags":[189,170,208,125,124,200,91],"wl_entity_type":[122],"class_list":["post-59351","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-emails","tag-cold-sales","tag-email","tag-email-marketing","tag-email-templates","tag-emails","tag-lead-generation","tag-sales","wl_entity_type-article"],"yoast_head":"<!-- This site is optimized with the Yoast 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