Can't seem to opt-in a large list of imported contacts to EDM's?

Here is the in's and out's of why Hubspot stops you from degrading your email sender scores

Email deliverability is a feedback loop for whether you’re sending the right content to the right contacts at the right time. Email engagements such as clicks open and spam complaints contribute to your email sending reputation. Higher rates of positive engagements improve your chances of reaching the inbox instead of getting stuck in a spam filter.

What attributes to a bad sender score?

Inconsistent Volume of Email Sends

See the graph in the top right corner of the Sender Score report? Their email send volume goes up at a pretty steady rate, and as a result, their score maintains a pretty even number. However, if you were to send 5,000 emails on Monday, 200 on Friday, nothing for a week, and then suddenly another 15,000, you would likely get dinged for sending inconsistent volumes of emails.

Frequency of Sends

Just as the volume of sends should be consistent, so should the frequency with which you email recipients. Email every day, every other day, every week -- whatever your needs are. Just make sure you don't jump on the email marketing bandwagon, abandon it after a month, then hop back on and expect no deliverability penalties. As you perfect your email marketing machine, you'll be able to test the optimal email sending frequency for your recipients.

Cold IP Address 

If you're new to email marketing, you may have neglected to warm up your IP address. Start email marketing on a new IP address with small batches of the best people on your email list -- you know, the ones who love you and won't mark you as SPAM or unsubscribe from your communications. Progressively increase the number of people you email to warm up your IP and prove you're a safe sender.

Being Blacklisted

There are about 50 known blacklists out there that denote which IPs are spammers. Return Path has a service that lets you see if you're on a blacklist. Assuming you're a legitimate email marketer who just didn't know some of the rules for good email deliverability, visit the sites of those who have blacklisted you to consult their information for being removed from their blacklist. If you contact them for removal, they will help you understand why you were blacklisted in the first place and what you can do to improve your email marketing methods.

Getting Caught in a Spam Trap

A spam trap is an email address that was once valid, but no longer is, and will thus garner a hard bounce notice when you email them. However, when a mail server sees consistent traffic going to the dead email, they can turn the email into a spam trap that will stop returning a hard bounce for the known bad address, and instead, accept the message and report the sender as a spammer. The moral of the story here is, if you're not monitoring your hard bounces and removing them from your active email list, you could be perceived as a spammer.

SPAM reports

Finally, if your email recipients think you're a spammer and identify you as such via a SPAM report, your sender reputation is going to suffer. Check the rate at which your emails are marked as SPAM -- an acceptable rate is 1 in every 1000.

If you are excited about HubSpot's features and would like to learn more feel free to contact us!