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Nicolas Toper

Nicolas Toper

Founder of CritSend

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Hotmail Deliverability Remedies

Best Practices/Standards, Uncategorized - March 30, 2012 - Comments Off

Today we will be focusing on the theory behind Hotmail deliverability system. This is the second post after CritSend, we believe in open sharing of deliverability information, and that deliverability is more of a science than a mysterious dark art. Even though our system fully automates these steps and responses and these are integrated directly [...]

DMARC: What is it and how does it work? First impressions.

Current Affairs - February 1, 2012 - 1 Comment

Introduction DMARC was announced earlier this week. It is a proposal by major email players to unify email authentication. It is touted as a major game changer. Let’s see what it is. Caveat: The spec was just published; I might have misunderstood some points. In such case, please email me or leave it in the comments [...]

Fixing Gmail Deliverability Problems

Uncategorized - November 7, 2011 - Comments Off

Fixing Gmail Deliverability Problems Today we will be focusing on how to diagnose and fix Gmail deliverability trouble. This is the first in a series of articles we will be running on demystifying some of the deliverability tech stacks out there. Where I work at CritSend, we believe in open sharing of deliverability information, and that [...]

Is Email Dying?

Is Email Dying?

Best Practices, Best Practices/Standards, Uncategorized - April 26, 2011 - 4 Comments

Over the last few months, some Internet pundits have declared that email is dying. They proclaim their fear for the future of emails is cannibalization by Facebook and Twitter. How Many Automated Email Are Sent Per Day? According to Pingdom, there is a total of about 3 billion email accounts on the planet. Assuming all [...]

Transitioning from IP to DNS: Part 1

Transitioning from IP to DNS: Part 1

Domain Keys/Authentication, Reputation - June 20, 2008 - Comments Off

Emails are sent from a mail server (a MTA) to another. The receiving MTA chooses to accept or not the email, hence deliverability issues. Most antispam filters are based on the idea than a given mail server has a specific…

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