Email reputation is not email specific but domain-specific, so if you have one email account [email protected], and that domain is used for sending cold emails.

For whatever reason due to a high bounce rate, [email protected] gets flagged or starts to lose its email reputation, it will cause a domino effect on all other email accounts on the same domain.

So even if  a fresh user is added, e.g [email protected], she will inherit James's email reputation rendering the value of that domain low.

For this reason having an efficient scalable system is crucial to help grow but also protect your outbound process so you’re not left without healthy email accounts due to high spam scores on some email accounts.

By efficient scalable system, I mean per domain a maximum of 2-3 email accounts. Lets breakdown why,

Advantages:

• Easy to maintain 2 accounts per domain
• If one account starts to go to spam, you only lose 2 accounts at max
• When your build reputation for one account, you’re automatically sharing it with another, so boosting the other domain “for free, without waiting for 2 weeks”

Disadvantages:

• Scaling will take more domains with just 2 email accounts per domain

We’re talking about 2 main email providers and how to set up buy & email accounts with them, the 2 being Gmail and Outlook.

With respect to the choice between the 2, Gmail is the more popular choice due to the “better” deliverability it gives by a 3-5% (from testing).

This will lead to unwanted disconnects if the email sending is abused too soon, for this reason its advised to keep Gmail sending to 40-60 per day at maximum after a healthy amount of warming.

In addition, Gmail set up can be quite tedious due to the 2FA restriction they introduced since May 2022. So you’re better off with oAuth setup for Gmail, Outlook doesn’t offer any other form other than oAuth anyway.