Email Deliverability Statistics Q4 2024: Delivery Rates for Popular Inbox Providers and Senders

Estimated reading time: 9 minutes

Email deliverability, defined as the ability of an email to successfully reach the recipient’s inbox, rather than being flagged as spam or failing to deliver, remains a critical aspect of email marketing. Whether a company is sending transactional emails, marketing, or cold outreach campaigns, it is important to get the emails delivered to the recipients’ Inboxes. A sure way to find out where the message lands is through an email deliverability test. 

At GlockApps, we started collecting email deliverability statistics based on email spam tests made on the platform at the end of 2023. We shared quarterly email deliverability reports with the average email placement ratios to see how the numbers change over time. And now we are here with the email deliverability statistics for the quarter 4 of 2024. Read on to learn about the latest deliverability trends, email placement rates by ISPs, and sender groups.

This data can help you:

• compare your email deliverability rates with industry averages;
• analyze email placement trends across major ISPs;
• understand how to maintain good performance with ISP;
• choose trusted ESP with clean IPs for reliable email delivery.

Email Deliverability Statistics: Top 10 Email Service Providers

The reputation of the email service provider (ESP) that tries to deliver a message is still an important factor. Reputable ESPs use IP addresses with a good reputation to send email messages for their clients. When choosing an ESP for your email marketing, it’s important to take the type of email communications you will be sending into account. Some providers may be suitable for cold email outreach while others may require only opt-in lists to be loaded into their database. 

According to the data collected during the quarter 4 of 2024, the list of the top 10 email service providers used by the GlockApps clients is as follows:

1. Google – 34%
2. Amazon SES – 12%
3. Brevo -11%
4. Mailgun – 10%
5. Outlook – 8%
6. SendGrid – 8%
7. Klaviyo – 4%
8. ActiveCampaign – 3%
9. Drip – 2%
10. CampaignMonitor – 2%

Email Deliverability Statistics: Email Delivery Rates per Senders (ESPs)

Next, we share the chart of email deliverability for the top 20 ESPs based on the GlockApps email tests made in quarter 4 of 2024. 

Note: in all our charts, only the messages delivered in Inbox or Spam were counted. Undelivered messages (blocked or rejected) were omitted.

ESP	Average Inbox Rate (%)	Average Spam Rate (%)
Protonmail	74,98	12,29
com.au	55,94	14,46
Hubspot	47,17	30,28
ConvertKit	46,54	24,89
Outlook	46,54	31,47
Klaviyo	44,20	26,45
Google	42,87	36,21
CampaignMonitor	42,48	31,95
MailChimp	40,92	32,29
Amazon SES	39,61	27,72
Drip	37,26	50,90
ActiveCampaign	35,33	28,01
SendGrid	30,63	38,92
Mailgun	29,18	44,57
Zoho	24,66	48,36
SMTP.com	24,28	41,67
Brevo	23,79	32,82
Dotdigital	20,56	31,08
cp20.com	15,38	54,69
MailerSend	13,91	40,01
Total:	36,14	33,35

Email Deliverability Statistics Q4 2024: Email Delivery Rates per Volume

Now we’ll dive into the details and share email deliverability statistics for different groups of email senders depending on the number of messages sent per month. 

Email Deliverability Rate: 1 – 10,000 Emails per Month

The analysis of our tests returned the following average email delivery rates for small volume senders in quarter 4 of 2024:

ISP	Inbox Average (%)	Spam Average (%)
Att.net	62,35	15,44
Amazon Workmail	49,19	0,4
GMX.com	47,26	2,09
Zoho	23,95	5,49
Exchange (Office 365)	22,24	16,78
G Suite (Google Workspace)	21,39	10,61
Outlook	18,38	62,94
Hotmail	16,21	58,36
AOL	12,81	35,41
Gmail (4 years+)	12,49	11,70
Gmail (6 months+)	12,12	9,26
Yahoo	11,41	32,59
Total	25,82	21,76

Email Deliverability Rate (Q4 2024): 10,001 – 50,000 Emails per Month 

The average delivery rates for the senders with 10,001 – 50,000 messages per month are presented in the table below:

ISP	Inbox Average (%)	Spam Average (%)
GMX.com	84,51	2,42
Amazon Workmail	82,55	1,21
Gmail (6 months+)	73,48	12,72
G Suite (Google Workspace)	70,68	18,60
Gmail (4 years+)	67,93	18,33
Exchange (Office 365)	67,91	11,00
Zoho	54,52	8,99
Att.net	50,96	30,38
AOL	41,38	43,22
Yahoo	40,29	44,87
Hotmail	36,51	45,75
Outlook	34,36	48,55
Total	58,76	23,84

Email Deliverability Rate (Q4 2024): 50,001 – 200,000 Emails per Month

The analysis of email test reports for email senders with the volume of 50,001 – 200,000 messages per month revealed these average delivery rates in quarter 4 of 2024:

ISP	Inbox Average (%)	Spam Average (%)
GMX.com	88,91	3,68
Amazon Workmail	88,00	0,17
G Suite (Google Workspace)	74,07	21,20
Zoho	71,44	3,51
Gmail (6 months+)	65,89	25,02
Att.net	48,13	43,63
Gmail (4 years+)	46,61	44,37
Hotmail	43,06	45,14
Exchange (Office 365)	40,96	34,15
Outlook	36,85	52,43
AOL	30,43	58,91
Yahoo	29,27	59,68
Total	55,30	32,66

Email Deliverability Rate (Q4 2024): 200,001 – 1,000,000 Emails per Month

Based on the tests made in GlockApps in quarter 4 of 2024, we calculated the following email delivery rates for large volume senders (200 -1,000K /month):

ISP	Inbox Average (%)	Spam Average (%)
GMX.com	94,18	2,52
Amazon Workmail	92,86	0,39
G Suite (Google Workspace)	76,19	19,83
Gmail (6 months+)	71,28	21,10
Gmail (4 years+)	70,37	21,23
Zoho	66,52	6,42
Exchange (Office 365)	65,24	17,06
AOL	55,33	40,30
Yahoo	55,09	40,79
Hotmail	53,75	39,08
Outlook	46,28	44,65
Att.net	43,84	37,92
Total	65,91	24,27

Email Deliverability Rate (Q4 2024): 1,000,000+ Emails per Month

The analysis of email tests made by the senders with one million emails per month and more returned these average delivery rates in quarter 4 of 2024:

ISP	Inbox Average (%)	Spam Average (%)
Amazon Workmail	54,48	0,88
GMX.com	52,84	3,23
Exchange (Office 365)	39,81	21,30
Gmail (6 months+)	37,08	57,74
Att.net	32,53	19,71
AOL	30,75	15,96
Yahoo	30,07	15,58
G Suite (Google Workspace)	25,98	66,32
Hotmail	25,77	40,34
Outlook	25,49	40,02
Zoho	22,57	4,60
Gmail (4 years+)	14,34	18,20
Total	32,64	25,32

Email Deliverability Rate (Q4 2024): Average Inbox Placement per Volume

To summarize, we share the aggregate table with the average Inbox placement rates for the monitored Internet service providers divided by the sender groups.

ISP	Sent emails / month					Total Average (%)
	1 – 10K	10K – 50K	50K – 200K	200K – 1,000K	1,000K+
Amazon Workmail	49,19	82,55	88,00	92,86	54,48	73,42
AOL	12,81	41,38	30,43	55,33	30,75	34,14
Att.net	62,35	50,96	48,13	43,84	32,53	47,56
Exchange (Office365)	22,24	67,91	40,96	65,24	39,81	47,23
Google Workspace	21,39	70,68	74,07	76,19	25,98	53,66
Gmail (4 years+)	12,49	67,93	46,61	70,37	14,34	42,35
Gmail (6 months+)	12,12	73,48	65,89	71,28	37,08	51,97
GMX.com	47,26	84,51	88,91	94,18	52,84	73,54
Hotmail	16,21	36,51	43,06	53,75	25,77	35,06
Outlook	18,38	34,36	36,85	46,28	25,49	32,27
Yahoo	11,41	40,29	29,27	55,09	30,07	33,23
Zoho	23,95	54,52	71,44	66,52	22,57	47,80

Takeaways

Based on the analysis of the reports received by GlockApps during quarter 4 of 2024, here are the key takeaways we’d like to bring your attention to:

• Senders with 1 – 10K emails per month had the best Inbox placement rate with the Att.net provider – 62,35% on average and the worst Inbox rate with the Yahoo provider – 11,41% on average.
  
• Senders with 10K – 50K emails per month had the best Inbox placement rate with the GMX.com provider – 84,51% on average and the worst Inbox rate with the Outlook provider – 34,36% on average.
  
• Senders with 50K – 200K emails per month had the best Inbox placement rate with the GMX.com provider – 88,91% on average and the worst Inbox rate with the Yahoo provider – 29,27% on average.
  
• Senders with 200K – 1,000K emails per month had the best Inbox placement rate with the GMX.com provider – 94,18% on average and the worst Inbox rate with the Outlook provider – 46,28% on average.
  
• Senders with 1,000K+ emails per month had the best Inbox placement rate with the GMX.com provider – 52,84% on average and the worst Inbox rate with Gmail aged addresses (3 years+) – 14,34% on average.

We shared our email deliverability statistics for quarter 4 of 2024 to help you understand how your metrics compare to the average rates. It’s important to remember that email placement is determined by a variety of factors where your sending habits and sender reputation take the leading role.  

As always, we encourage the senders to use GlockApps Inbox Insight tests to ensure their important email campaigns are delivered in the Inbox before sending them live.