A successful connection triggers the four-step Simple Mail Transfer Protocol (SMTP) process: 1) Identifying the sending and receiving server...

If no connection can be made, it might indicate a permanent issue (e.g., the domain doesn't exist) or a temporary issue (e.g., a bad con...

Next, the MTA connects with the MX record for the DNS of the domain (e.g., gmail, or companyname) to which you're sending. A domain'...

It's good to know the typical route of how a promotion gets from you to ultimately your subscriber. First, your email service provide...

Shorter email subject lines perform better. Those containing 4 to 15 characters attract the highest open rates of 14.1% while those with 51 ...

Subscriber retention rate = # subscribers – bounce backs – unsubscribes / # subscribers How much do you stink? This is perhaps as strateg...

Click-to-deliver rate (CTDR) = # of clicks / # of emails delivered This is a key measure of the quality of your email list, and of the ef...