Author: Pankaj Kumar

Pankaj Kumar is an Email Deliverability Expert and Product Leader with 13 years of experience in email deliverability, CRM, marketing analytics, deliverability onboarding, implementation, and automation. He combines deep technical expertise in email infrastructure, inbox placement, sender reputation, and authentication protocols with a product-driven approach to solving complex deliverability challenges at scale. Having worked with Zeta and Blueshift, Pankaj has helped hundreds of clients improve email performance through data-driven strategies, technical troubleshooting, and scalable automation. His focus extends beyond resolving deliverability issues to building smarter deliverability products, monitoring systems, and AI-powered solutions that help businesses proactively identify risks and improve inbox placement. Through his blog at University of Email, Pankaj shares practical insights on email deliverability, CRM strategy, marketing analytics, and emerging deliverability technologies to help email marketers and technical professionals make informed decisions and achieve better results. Connect with him on LinkedIn at https://www.linkedin.com/in/pankajkumar-deliverability

Last year we all have heard about AOL and Yahoo merger news and just few months later AOL and Yahoo planned to call themselves by a new name after the Verizon deal closes: ‘Oath’. This time they said they will merge the mail infrastructure – AOL MX record serving our consumer brands. Here is the exact update – As a first step, starting this week, the majority of AOL’s MX records will point to our new combined servers. This should be transparent to any sender as those servers will operate in simple pass-through mode. This means senders with established FBLs will…

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Everyone knows the name of the excellent communication channel over the internet so far is none other than Email. Check out some facts that reveal how email industry looks like in numbers and how bigger it is. Below are email statistics which is up to date as of September 2017. I’ll work on collecting the most recent numbers as well and will make a post. By the way, all the counts which are given below are taken from Radicati Group. The below numbers means a lot for an email marketers. These numbers are really interesting for them. Deliverability expert should pay…

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SPF stands for Sender Policy Framework. Don’t go with its name like other terminology where you’ll find written something like ‘as its name suggest’. Because its name won’t suggest you anything for the first time 🙂 It is an Email Authentication technique where the sender can make a stamp on their “Envelope” MAIL FROM (sending domain). It designates for a particular set of mail servers. In simple word you are telling to internet world that you are going to have an “Envelope” MAIL FROM (sending domain), which will send some amount of emails from a fixed number of mail servers.…

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According to Radicati, the total number of worldwide email accounts was 3.9 billion in 2013 and was projected to be 4.9 billion by 2017. and now we just entered in 2018 so number must have grown further. But what you don’t see so frequently touted are the statistics on email usage. To put this in perspective for you, there are 3x more email accounts than there are Facebook & Twitter accounts combined. Did you know that organic reach on Facebook I.e. the number of your fans who actually see your posts in their Newsfeed is only 6%? Interesting.. right..! This…

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Email Marketers may observe incline in their complaint rate at Microsoft domains which may cause a problem to their deliverability further down because Microsoft recently made an update to their Mail Filtering system and the algorithm how they calculate complaint rates from their email users. Though the change is minor at first instance this isn’t. This may cause a bit more problematic for those senders whose email doesn’t clarify their motto or if the user doesn’t find the easy unsubscribe method. To calculate the complaint rate earlier all Mailbox provider used to take the total amount of complaints divided by…

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Before getting yourself about Email Authentication first you should know why we need it. The simple answer is why do you need an ID card? – Just to prove yourself that you are a genuine person for respective organization or authority. In the same way, email authentication concept comes into play. You should prove yourself that you are the one who takes the responsibility of that email so that your user can be safe from getting spam from others on behalf of your name and name reputation. Here you got it a new keyword ‘SPAM’. So what do you think?…

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Getting email delivered to the inbox requires doing a lot of things correctly. It is a fact of email marketing that you must follow certain deliverability factors to ensure ISPs (Hotmail, Gmail, Yahoo, etc) accept your email messages.There are multiple email deliverability factors which can affect your email campaign performance, some of the important ones are given below. Email content Content filtering is the major one which may impact your overall deliverability. Let’s have a look what is Content filtering – If you are using some suspected items in your email then ISP will definitely block your email based on…

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In my last post, I have discussed Email Deliverability. In this post, I am going to discuss some key terminology used in Email Marketing and Deliverability field. So here you go – 1.Scheduled or Sent Total number of email sent for any particular campaign. 2.Delivered count or Delivery rate The total number of email which was actually sent successfully from your mail server (ESP). Your email may not be delivered to your all subscribers for that campaign for a number of reasons. I’ll make a dedicated post on Email Bounces Delivery rate = (Total Delivered/Total Sent)*100% 3.Bounced (Hard+Soft) Total number…

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Deliverability Blog Post 1: Know the Email Deliverability So you are reading this article.. hmm.. great! now I can assume you have some idea of what I am going to write here. I won’t puzzle you anymore I am writing something about Email Marketing which may you already know something or in details? Here I’ll walk you through the complete picture of Email Deliverability post by post. Of course, I am not going to write all at once 🙂 What is Email Deliverability? First of all, we need to know that there is nothing such word (Deliverability) in English dictionary.…

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