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HadarS
HubSpot Employee
HubSpot Employee

HubSpot Support Series: Email Tip!

This is the first in a series of tips from our most experienced HubSpot Support specialists. Upvote this post if you want more of these tips, and let us know in the comments what topics you’d like other quick tips on!

 

Did you know that the HubSpot platform will automatically adjust the speed at which mail is sent based on signals received by recipients’ mail servers? 

 

If a server sends signals back to HubSpot that mail is being sent too quickly, the platform will auto adjust the speed of the send based on that signal. Sends can be slowed (also known as throttling) to ensure that as much mail can be delivered as possible based on relevant signals from recipient mail servers. 

 

Tip: Try breaking larger sends into smaller segmented campaigns, and stagger each send to help reduce the need to slow the rate at which mail is sent.

2 Replies 2
sethao
Member

HubSpot Support Series: Email Tip!

Hi Hadar!

 

What would be considered a 'large' send and what size do you recommend breaking it down to?

 

Thanks!

HadarS
HubSpot Employee
HubSpot Employee

HubSpot Support Series: Email Tip!

Hi @sethao great question, and at the same time, a difficult one!

 

Each ISP makes its own decision on when they will limit inbox placement and they don't share this information publically (that would be similar to Google sharing their SERP algorithms) 😉 Typically it's based on factors like ISP,  sender's history with that ISP, how much mail the ISP is getting from other senders at that time, etc.

 

HubSpot responds to the need for throttling based on the recipient server signal-   If a sender sees throttling bounces occur on a send for a group of recipients that share an inbox provider or organization, they can use that data to break their next send to those contacts into smaller segments which may help to prevent further throttling. 

 

In that sense, if you're emailing 20k Gmail users, you may choose to start by sending a small batch of your most engaged contacts, and continue with additional batches by monitoring any bounces due to throttling. If you do see bounces, that's a signal you may want to slow down and use smaller batches.

 

Cheers!

 

Hadar

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