{"id":4000,"date":"2017-09-29T12:12:30","date_gmt":"2017-09-29T10:12:30","guid":{"rendered":"https:\/\/woodpecker.co\/blog\/?p=4000"},"modified":"2025-01-21T10:26:26","modified_gmt":"2025-01-21T09:26:26","slug":"smtp-cold-emails","status":"publish","type":"post","link":"https:\/\/woodpecker.co\/blog\/smtp-cold-emails\/","title":{"rendered":"External SMTP for Cold Emails \u2013 Can It Improve My Deliverability?"},"content":{"rendered":"<p>This one&#8217;s about deliverability. And I&#8217;d say it&#8217;s for more advanced <span id=\"urn:enhancement-4d6774a5\" class=\"textannotation disambiguated wl-thing\">email<\/span> senders. I tried to explain things as simply as possible for all readers of the Woodpecker blog to get the idea behind the external <span id=\"urn:enhancement-56473a3b\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> services. Check what external <span id=\"urn:enhancement-69c75967\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> is, when it&#8217;s a good idea to use it, and\u00a0if you could be interested in using it to send your cold <span id=\"urn:enhancement-e6b8c5be\" class=\"textannotation disambiguated wl-thing\">emails<\/span>.<\/p>\n<p>Ok, so let&#8217;s start from the basics.<\/p>\n<p>Usually, when you get about cold <span id=\"urn:enhancement-be8e651b\" class=\"textannotation disambiguated wl-thing\">emailing<\/span>, you don&#8217;t know very much about <a href=\"https:\/\/woodpecker.co\/blog\/cold-email\/smtp-imap\/\" target=\"_blank\" rel=\"noopener noreferrer\">SMTP and IMAP<\/a>. You don&#8217;t\u00a0think about how sending <span id=\"urn:enhancement-91ef1148\" class=\"textannotation disambiguated wl-thing\">emails<\/span> work. You just want to hit &#8220;Send&#8221; and have your <span id=\"urn:enhancement-e4c9440a\" class=\"textannotation disambiguated wl-thing\">emails<\/span> delivered.<\/p>\n<p>Only a few campaigns later, if you pay attention to your deliverability rates, you might start digging into the <span id=\"urn:enhancement-56a88c69\" class=\"textannotation disambiguated wl-thing\">email<\/span> sending details. You may want to set up a <a href=\"https:\/\/woodpecker.co\/blog\/cold-email\/mailbox-for-outbound\/\" target=\"_blank\" rel=\"noopener noreferrer\">separate mailbox<\/a>\u00a0on a separate domain exclusively for cold <span id=\"urn:enhancement-baa2b187\" class=\"textannotation disambiguated wl-thing\">email<\/span> campaigns.<\/p>\n<p><strong><a href=\"https:\/\/woodpecker.co\/blog\/cold-email\/mailbox-for-outbound\/\" target=\"_blank\" rel=\"noopener noreferrer\">Check why separate mailbox for cold emails\u00a0gives you a better control of their deliverability &gt;&gt;<\/a><\/strong><\/p>\n<p>And if you do have a separate mailbox for sending cold <span id=\"urn:enhancement-8804e674\" class=\"textannotation disambiguated wl-thing\">email<\/span>, that&#8217;s great. That&#8217;s\u00a0the first step towards full control over your <span id=\"urn:enhancement-88f2bae\" class=\"textannotation disambiguated wl-thing\">email<\/span> deliverability.<\/p>\n<p>Using an external <span id=\"urn:enhancement-132151ec\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> service is another step, which you may want to take for even more control over how your <span id=\"urn:enhancement-10a8d50b\" class=\"textannotation disambiguated wl-thing\">emails<\/span> get sent and how many of them get delivered.<\/p>\n<p>Don&#8217;t get me wrong here: this is <em>not<\/em> a must. It&#8217;s an option you can take in some situations. I&#8217;ll describe some examples later on, but first&#8230;<br \/>\n\n<aside class=\"cta-block cta-block--a-version js-cta-block ab-no-10-cta-block ab-no-11-cta-block\">\n  <p class=\"cta-block__heading u-heading-preset-md-600\">Manage your<br \/>\nemail outreach<br \/>\nwith less effort<\/p>\n  <div class=\"cta-block__form-container\">\n    <form class=\"js-cta-block-form\" action=\"https:\/\/woodpecker.co\/signup\/\" class=\"cta-block__button-only-form js-cta-block-no-input-form\">\n      \n\n\n\n\n\n\n\n\n<button class=\"c-button js-button c-button--color-main c-button--size-small u-focus-visible-outline\">\nStart free trial\n<\/button>    <\/form>\n    \n    <form class=\"c-input-button-form js-cta-block-form cta-block__form\" action=\"https:\/\/woodpecker.co\/signup\/\" method=\"POST\" novalidate>\n        \n  <div class=\"c-form-field js-form-field  c-input-button-form__form-field\">\n    \n    <label class=\"c-label c-form-field__label\" for=\"cta-block-form-email-1968168383\">Work email<\/label>\n\n                    \n  <input class=\"c-input  js-input c-input-button-form__input\" placeholder=\"will@woodpecker.co\" name=\"email\" id=\"cta-block-form-email-1968168383\" type=\"email\" \/>\n            \n    <span class=\"c-form-field__error js-error\">\n                                      Invalid email format\n        \n\n                <\/span>\n  <\/div>\n\n        <div class=\"c-input-button-form__button\">\n          \n\n\n\n\n\n\n\n\n<button class=\"cta-block__button c-button js-button c-button--color-main c-button--size-small u-focus-visible-outline\">\n                Start free trial\n        \n\n<\/button>        <\/div>\n\n            <\/form>\n  <\/div>\n<\/aside><\/p>\n<h2>How does default SMTP work at major email providers?<\/h2>\n<p>As you may already know from my previous <a href=\"https:\/\/woodpecker.co\/blog\/cold-email\/smtp-imap\/\" target=\"_blank\" rel=\"noopener noreferrer\">post about SMTP &amp; IMAP<\/a>, <span id=\"urn:enhancement-c3e03ecf\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> is a protocol that takes care of sending your <span id=\"urn:enhancement-c283ee2f\" class=\"textannotation disambiguated wl-thing\">email<\/span> messages. Each <span id=\"urn:enhancement-ed0523e1\" class=\"textannotation disambiguated wl-thing\">email<\/span> service provider (like for instance Google, Outlook, Yahoo) offers you their own <span id=\"urn:enhancement-355141d6\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> and <span id=\"urn:enhancement-bf97410c\" class=\"textannotation disambiguated wl-thing\">IMAP<\/span> services.<\/p>\n<p>So usually, you don&#8217;t even think about it. You decide to use Gmail, so you get your <span id=\"urn:enhancement-651c8d43\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> service from Google (it&#8217;s just an example here, so don&#8217;t take it personally at any times).<\/p>\n<p>In such a case, you could compare Google\u00a0to\u00a0a post office. As a post office, Google hires mailmen to allow you to send messages (<a href=\"https:\/\/woodpecker.co\/glossary\/pop-post-office-protocol\/\">SMTP<\/a>) and receive messages (IMAP). You don&#8217;t get to choose who the Google&#8217;s mailmen are. You don&#8217;t know anything about their reputation: if they&#8217;re reliable, polite, or liked in their neighbourhood. You just trust Google, as a reputable post office, that they&#8217;ve hired reputable mailmen.<\/p>\n<p>But at such a big post office, there are so many mailmen that:<\/p>\n<ul>\n<li>Sometimes your messages will be delivered by the best ones <span style=\"font-weight: 400;\">\u2013<\/span> friendly, always smiling mailmen, who see every door\u00a0opening before they even reach for the doorbell.<\/li>\n<li>Sometimes your messages may be delivered by neutral mailmen,\u00a0the ones people don&#8217;t know and don&#8217;t treat as their friends\u00a0<span style=\"font-weight: 400;\">\u2013<\/span> but merely as mailmen.<\/li>\n<li>Or sometimes, your messages may be delivered by mailmen who for some reason have been detested by every dog in the neighbourhood, so they can&#8217;t even get to the door to actually\u00a0deliver your message to its recipient.<\/li>\n<\/ul>\n<p>Anyway, you can never be sure who will be chosen to deliver your message. It&#8217;s random.<\/p>\n<p>Now, in the domain of <span id=\"urn:enhancement-b4993110\" class=\"textannotation disambiguated wl-thing\">email<\/span>, the mailmen are the IPs. If you get assigned an IP\u00a0with a poor reputation to send a specific batch of <span id=\"urn:enhancement-2d1ccf65\" class=\"textannotation disambiguated wl-thing\">emails<\/span>, your deliverability rate may be lower because of that.<\/p>\n<p>You could try to check the IP reputation before sending, but the problem is, you are not just assigned the IP once. Every once\u00a0in a while, your <span id=\"urn:enhancement-c7ce4676\" class=\"textannotation disambiguated wl-thing\">email<\/span> provider assigns you a randomly chosen IP for sending <span id=\"urn:enhancement-40c87da5\" class=\"textannotation disambiguated wl-thing\">emails<\/span>. The IP changes. So you can&#8217;t have full control over that.<\/p>\n<h2>What is the external SMTP service?<\/h2>\n<p>Sticking to our post office metaphor, imagine you send your private letters via traditional mail, but you decide to hire another company to deliver exclusively your <span id=\"urn:enhancement-3e1515a8\" class=\"textannotation disambiguated wl-thing\">business<\/span> messages. In the company, you can hire a private mailman with proven impeccable reputation. This mailman&#8217;s job\u00a0will be to deliver your messages only. He won&#8217;t be working for anyone else but you.<\/p>\n<p>In the metaphor, the external mail\u00a0company you hire to deliver your <span id=\"urn:enhancement-87e21241\" class=\"textannotation disambiguated wl-thing\">business<\/span> correspondence is the external <span id=\"urn:enhancement-20bbc233\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> service provider. And your private mailman is a dedicated IP you may buy to be sure your <span id=\"urn:enhancement-9c4baba4\" class=\"textannotation disambiguated wl-thing\">emails<\/span> are not only smoothly sent, but also effectively delivered.<br \/>\n\n<aside class=\"cta-block cta-block--a-version js-cta-block ab-no-10-cta-block ab-no-11-cta-block\">\n  <p class=\"cta-block__heading u-heading-preset-md-600\">Get more leads<br \/>\nwith Woodpecker<\/p>\n  <div class=\"cta-block__form-container\">\n    <form class=\"js-cta-block-form\" action=\"https:\/\/woodpecker.co\/signup\/\" class=\"cta-block__button-only-form js-cta-block-no-input-form\">\n      \n\n\n\n\n\n\n\n\n<button class=\"c-button js-button c-button--color-main c-button--size-small u-focus-visible-outline\">\nStart free trial\n<\/button>    <\/form>\n    \n    <form class=\"c-input-button-form js-cta-block-form cta-block__form\" action=\"https:\/\/woodpecker.co\/signup\/\" method=\"POST\" novalidate>\n        \n  <div class=\"c-form-field js-form-field  c-input-button-form__form-field\">\n    \n    <label class=\"c-label c-form-field__label\" for=\"cta-block-form-email-1015656109\">Work email<\/label>\n\n                    \n  <input class=\"c-input  js-input c-input-button-form__input\" placeholder=\"will@woodpecker.co\" name=\"email\" id=\"cta-block-form-email-1015656109\" type=\"email\" \/>\n            \n    <span class=\"c-form-field__error js-error\">\n                                      Invalid email format\n        \n\n                <\/span>\n  <\/div>\n\n        <div class=\"c-input-button-form__button\">\n          \n\n\n\n\n\n\n\n\n<button class=\"cta-block__button c-button js-button c-button--color-main c-button--size-small u-focus-visible-outline\">\n                Start free trial\n        \n\n<\/button>        <\/div>\n\n            <\/form>\n  <\/div>\n<\/aside><\/p>\n<h2>So, is the external SMTP for everyone?<\/h2>\n<p>I&#8217;d say it&#8217;s not. And that&#8217;s because it is an advanced <span id=\"urn:enhancement-344e0f73\" class=\"textannotation disambiguated wl-thing\">email<\/span> configuration that requires:<\/p>\n<p>a) additional\u00a0advanced configuration of your\u00a0domain and DNS servers,\u00a0so if you&#8217;re not able to handle that, perhaps it&#8217;s not the best solution for you;<\/p>\n<p>b) additional costs of the <span id=\"urn:enhancement-e13d9dac\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> service, so you really need a good reason and a specific situation to benefit from it.<\/p>\n<p>If you&#8217;re sending classic cold <span id=\"urn:enhancement-e6052dfa\" class=\"textannotation disambiguated wl-thing\">email<\/span> campaigns including 1-8 messages in the sequence, to 50 prospects a day, at a moderate pace, the default <span id=\"urn:enhancement-8a420edd\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> service of your <span id=\"urn:enhancement-422edb17\" class=\"textannotation disambiguated wl-thing\">email<\/span> provider should work\u00a0just fine for you.<\/p>\n<p>Usually, external <span id=\"urn:enhancement-e5300c79\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> providers\u00a0offer you\u00a0higher daily limits than the major <span id=\"urn:enhancement-72848a9c\" class=\"textannotation disambiguated wl-thing\">email<\/span> service providers. So if you&#8217;re planning an occasional more intense frequency of sending for one of your campaigns, you may think about that.<\/p>\n<p>What&#8217;s important, however,\u00a0the dedicated IP of impeccable reputation that I mentioned in my mailman metaphor is something you actually need to pay extra for. So, to be clear, external <span id=\"urn:enhancement-a2d8ad1b\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> providers won&#8217;t offer you the dedicated IP with excellent reputation by default in each of their pricing plans.<\/p>\n<p>But above all that&#8230;<\/p>\n<h3>A great IP won&#8217;t do the 100% job for good deliverability!<\/h3>\n<p>Remember that the mailman delivering your message is just one factor affecting deliverability.<\/p>\n<p>If you have the best mailman, but you have him deliver sloppy, irrelevant messages\u00a0\u2013 people won&#8217;t like to get the messages anyway&#8230;<\/p>\n<p>So if even if you use a dedicated IP, but you send low-quality messages to thousands of poorly targeted prospects, you won&#8217;t get positive results. In fact, your crappy messages may in the long run spoil the great reputation of your dedicated IP. So this way, you&#8217;re just burning your money.<\/p>\n<p>Don&#8217;t think of\u00a0an external <span id=\"urn:enhancement-775d892\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> option as an opportunity to send more messages in the &#8220;throw spaghetti\u00a0at the wall and see what sticks&#8221; fashion.<\/p>\n<p>Instead, treat it as an opportunity to have more deliverability factors under full control. And take a good care of the quality of your outreach to make sure deliverability is at its highest possible levels.<\/p>\n<h2>When you might want to use an external SMTP service?<\/h2>\n<p>I mentioned before that the external <span id=\"urn:enhancement-a68ff59e\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> may be a good option in some specific situations. Here are some examples:<\/p>\n<ol>\n<li>If you&#8217;ve put a lot of work to improve your deliverability rates (aka, you&#8217;ve checked the <a href=\"https:\/\/woodpecker.co\/blog\/cold-email\/deliverability-checks\/\" target=\"_blank\" rel=\"noopener noreferrer\">14 points on the deliverability checklist<\/a>), and you still have reasons to suspect the deliverability of your messages might me at a low level, you may try\u00a0an external <span id=\"urn:enhancement-965f7795\" class=\"textannotation disambiguated wl-thing\">SMTP<\/span> to control the reputation of your IP. But leave it for the end of the list while working on your deliverability.<\/li>\n<li>If you&#8217;re using <a href=\"https:\/\/woodpecker.co\/features\/followup-automation\/\" target=\"_blank\" rel=\"noopener noreferrer\">Woodpecker&#8217;s email automation<\/a> to send messages other than cold emails \u2013 which require higher frequency of sending, or have to be sent in greater batches at a shorter time, like for instance <a href=\"https:\/\/woodpecker.co\/industries\/saas\/\" target=\"_blank\" rel=\"noopener noreferrer\">automated retention emails to your SaaS users<\/a> \u2013 you may want to think about\u00a0an external SMTP service.<\/li>\n<li>If you&#8217;re organizing an event and you want to send emails to a greater number of the event attendees at short notice, you may want to use\u00a0an external SMTP to be able to send more messages faster for this specific occasion. Keep in mind, though, that these prospects should be interested in your message and happy to engage with it, if you want to see satisfactory effects. Again, don&#8217;t send leaflets to just anyone there is, because it will ruin your outreach no matter what you use to send it out! Take care of\u00a0precise targeting. Always.<\/li>\n<\/ol>\n<h2>What are the companies offering an external SMTP service?<\/h2>\n<p>Woodpecker has been designed to send messages from your own mailbox, so we do not offer external SMTP services. But if you wish to connect an external SMTP service to Woodpecker, <a href=\"https:\/\/woodpecker.co\/blog\/cold-email\/mailgun-sendgrid\/\" target=\"_blank\" rel=\"noopener noreferrer\">it&#8217;s possible<\/a>.<\/p>\n<p>There are quite a few companies offering external SMTP services, actually. You can check those 2 collections to find some names, descriptions, pricing and more:<\/p>\n<ul>\n<li class=\"post-title\"><strong><a href=\"https:\/\/www.formget.com\/smtp-service-providers\/\" target=\"_blank\" rel=\"noopener noreferrer\">10 Best SMTP Service Providers 2017 &gt;&gt;<\/a><\/strong><\/li>\n<li><strong><a href=\"http:\/\/www.accuratereviews.com\/smtp-server-user-guide\/\" target=\"_blank\" rel=\"noopener noreferrer\">2017 Top SMTP Server Reviews List &gt;&gt;<\/a><\/strong><\/li>\n<\/ul>\n<h2>Final words<\/h2>\n<p>Before\u00a0you decide to try out an external SMTP service to send your cold email campaigns, make sure you&#8217;ve done everything else to improve your deliverability rate. If you go for a dedicated IP without taking care of your email copy, the quality of your prospect base, and some basic settings \u2013 it&#8217;s all for nothing, because after sending a first larger batch of emails, even from an ideal IP, your deliverability will drop down anyway.<\/p>\n<p>Check out this\u00a0<strong><a href=\"https:\/\/woodpecker.co\/blog\/cold-email\/mailgun-sendgrid\/\" target=\"_blank\" rel=\"noopener noreferrer\">guide on connecting Woodpecker with an external SMTP &gt;&gt;<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This one&#8217;s about deliverability. And I&#8217;d say it&#8217;s for more advanced email senders. I tried to explain things as simply as possible for everyone to get the idea behind the external SMTP services. Check what external SMTP is, when it&#8217;s a good idea to use it, and\u00a0if you could be interested in using it to send your cold emails.<\/p>\n","protected":false},"author":17,"featured_media":4025,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[13],"tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.11 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>External SMTP for Cold Emails \u2013 When Is It a Good Idea?<\/title>\n<meta name=\"description\" content=\"Check if using an external SMTP service to send cold emails it&#039;s a good idea in terms of deliverability. What is external SMTP? 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