If you’re a cold emailer using any cold email platform other than mine, you’re likely subject to limits in the hundreds of emails per day. For most people, that allowance of a few hundred emails/day is enough, since it’s quite hard to find more than even 100 targeted prospects’ email addresses per day, where your message is relevant enough to the prospect that it doesn’t seem spammy.
But, let’s say you’re just that good at finding leads and capturing email addresses. Let’s go crazy here for a second and say you’ve fine-tuned a process that brings in 5,000 new email leads per day, and every day, you want to email these 5,000 email addresses and set a follow-up sequence that sends every few days until they reply. Now you’re in deep, because not only do 5,000 new email messages need to send every day, but once the follow-up schedules start to kick in, you’ll actually be sending more than 5,000 emails/day, when you take into account the original message volume and the follow-up email volume.
So, given G Suite’s limits of 2,000 emails/day and most cold email platforms’ own limits, how can you accomplish this?
You could set up multiple G Suite accounts and eventually send 2,000 emails per day per account. However, as years of experience has shown, it doesn’t always work so smoothly, and often times G Suite caps an account’s sending volume at a level much lower than 2,000 emails/day. This can work for some users but won’t work for most.
Last year, I invented a way to integrate an SMTP service or multiple SMTP servers into a high volume cold email process such that you can send as many emails as you want through an SMTP server like SendGrid, while preserving the ability to detect replies and send follow-up emails to non-responders. We do this through a little bit of inventiveness in how we relay the emails through an SMTP and sync the data back to your G Suite account.
Recent High Volume Cold Email Campaigns
Here is a sampling of recent large cold email campaigns sent by our platform in the last few weeks. Included are the number of auto follow-up stages and the open and reply rates. Some of these were distributed in daily batches via Gmail and some were sent via a third party SMTP relay.
This cold email campaign data is updated daily.
| From Address | Subject | Follow-up Stages | Recipients | Open Rate | Replies | Date |
|---|---|---|---|---|---|---|
| trevor@xxxx.bio | L___s s______y y__r i________r m_______g t______g | 2 | 3,364 | 100.0% | 2 | 04/18/25 |
| katierose@xxxxxxxxxxxxx.com | M__e a C______l I________n - L_______y - W__h C___P S___p B_____! | 1 | 2,344 | 89.0% | 44 | 04/23/25 |
| katierose@xxxxxxxxxxxxx.com | S_____t Y__r D___s W______s w__h C______n C___s T__t P_____e J____, S___, C___, a_d D_______e H____h | 1 | 2,089 | 78.8% | 12 | 04/24/25 |
| jaeson.bang@xxxxxxxxxxxx.com | U____e f__m J_e B__g - F____e C____a (__A O____e H_____) | 1 | 3,574 | 65.8% | 34 | 04/24/25 |
| sales@xxxxxxxxxxxxxxxxxxxxx.com | N_w A___________g S______e T______r "______" | 2 | 2,846 | 54.8% | 61 | 04/23/25 |
| garyw.inbox@xxxxx.com | {____t N___} - G_t M_______t D______s S______e U___s | 1 | 2,198 | 46.7% | 9 | 04/25/25 |
| liezl@xxxxxxxxxxxxxxxxxxxxx.com | A_______a T_________c G___s A____________n (___) R_________s a_d C_________: U_____s f_r {___________________} | 0 | 7,223 | 43.2% | 5 | 04/18/25 |
| rahul@xxxxxxxx.com | P__d C______! T_p L____y B____s | 3 | 3,674 | 40.4% | 357 | 04/23/25 |
| elizabeth@xxxxxxxxxx.co | I_____: S___S OF W______S P_P U_S A___L 2__H & 2__H | 1 | 2,162 | 39.8% | 73 | 04/22/25 |
| sarah@xxxxxxxxxx.com | C_______d A________n I___________l T_x P______g a_d S_________g M_____r f_r {___________________} | 0 | 10,241 | 38.8% | 1 | 04/22/25 |
| kristen@xxxxxxxxxxxxxxxxxxxxxxxx.com | 5__2 J__n C______n R_____d H____n a_d F____r S_____r N__t G______h | 4 | 2,387 | 38.4% | 2 | 04/21/25 |
| sanjinomerovic@xxxxxxx.de | I__e d______e T____________n m_t D_____l | 1 | 4,801 | 33.2% | 66 | 04/24/25 |
| info@xxxxxxxxxxxxxxx.eu | C_t S___e C____, N_t Q_____y – B____c C___________p f_r S__________n P______s | 1 | 2,478 | 32.7% | 23 | 04/25/25 |
| dhanush@xxxxxxxxxxx.in | P__d C______! T_p L____y B____s | 3 | 3,576 | 30.3% | 250 | 04/23/25 |
| diana@xxxxxxxxx.ai | C_____t T___X B_______a R__________n L__k | 1 | 3,700 | 30.1% | 11 | 04/25/25 |
| declan@xxxxxxxxxxxx.com | Q___k F____r – H__p I_____e E___s a_d g____r e______e | 1 | 6,651 | 29.7% | 187 | 04/25/25 |
| kim.gullion@xxxxxxxxxxxxxx.net | Q___k t___h b__e | 1 | 8,983 | 29.5% | 7 | 04/23/25 |
| lily.businessdata7@xxxxx.com | {____t N___} | C__________n I______y P___________s L__t | 1 | 2,154 | 28.9% | 4 | 04/22/25 |
| jthayer@xxxxxxxxxxxxxxxx.com | C___f of N___l O________s | A______c M___________n S_____t | R_P O_________y | 3 | 16,994 | 26.7% | 41 | 04/22/25 |
| diana@xxxxxxxxx.ai | J__n T___X in B_______a t__s S_______r | 1 | 8,250 | 24.5% | 16 | 04/22/25 |
Steps to sending high volume cold email:
- Set up your G Suite account, and connect it to GMass.
- Set up a SendGrid account or any other SMTP service and subscribe based on the daily volume of emails you want to send. When determining daily volume, take into account the original message plus follow-up emails that need to go out per day.
- Connect SendGrid, or your alternate SMTP service to GMass.
- When you launch your cold email campaign in GMass, set the SMTP option instead of Gmail.
- Configure your auto follow-ups.
- Hit the GMass button to launch the campaign.
What happens next?
Even though your emails are being sent by SendGrid, you’ll still see a copy of each individual email in the Sent folder of Gmail. When someone replies, the reply will still be threaded to the same conversation as the email in the Sent folder. And if someone doesn’t reply, and a follow-up email sends automatically in a few days, that follow-up will also be threaded to the same email conversation.
But wait, I’m not technical enough to set up SendGrid!
If setting up your own SMTP service is too complicated, and you don’t want to bother with the implications of DNS records, SPF, DKIM, DMARC, and all the subtleties that are recommended for deliverability, you have a couple of options:
- Sometimes we allow users to use our SMTP service — but typically for cold email that isn’t opt-in, we don’t.
- There’s a fiverr gig these days where someone will help you configure a SendGrid account for use with GMass.
- You sign up for SendGrid and subscribe, and then send us your credentials and we’ll link GMass to SendGrid for you.
By the way, if you’re an advanced web developer and this all sounds to easy for you, you may want to read my technical review of SendGrid to take a look under the hood and see if you want to customize your SMTP process. That review is written specifically for advanced web developers.
How high is our volume?
When you’re shopping different cold email platforms, ask them how much email they send. Then check our real-time counter for how much email we’ve sent. We’ve sent over 1 billion emails through Gmail and G Suite accounts. Not all of them were cold email campaigns, but a lot of them were.
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Ajay is the founder of GMass and has been developing email sending software for 20 years.
Do I need the paid version of SendGrid? If so what particular feature is it that is not available on the free version that I am paying for? Is this something that would be resolved if I simply use HubSpot or MailChimp?
Using SendGrid to send cold emails in bulk, the account will soon be banned, which won’t work.
Great. I am going to go with GMass.
Great article. Do you think the age of the domain and/or the email address affects the results when using GMass
and SendGrid?
Hi Peter,
Yes, it could affect deliverability. Even though the emails are being sent using an external SMTP, the from address would still be tied to the email address’s domain. So the email address and domain’s reputation would still play a part on deliverability. However, we couldn’t say how big of a part it does play.
gostaria muito de adquirir esse projeto de envios frios em massa
i have a single gmail acount
i want to send more than 5000 emails per day,
can you suggest me in a easy way how can i send?
Hello GMASS,
Could you please provide me with alternative methods to pay my credit card? I’m experiencing some buffering issues and it’s not giving me any results.
If you provide me GPAY option or UPI option that will be easy for me to make payment.
Hi, I read the different posts on SendGrid account for use with GMass. I have the free GMass
and I want to send more than 50 emails a day. How many emails can I send with the $25 a
month with the GMass? Is there a fee for the SendGrid too?