Amazon SES and Postmark Email Deliverability Comparison

In this comparison, the deliverability of Amazon SES and Postmark is compared in detail. All available data, taking the filters into account, is used for the comparison.

Email deliverability

This comparison compares the numbers for sent emails, you can also see in which folder the emails at the email service provider ended up and how many emails were lost on the way. The numbers look better for Amazon SES than for Postmark.

Emails Sent	Emails Inbox	Emails Spam	Emails Lost
61.809 62.077	53.094 50.973	6.813 8.694	1.902 2.410

Email deliverability rates

The following table shows the most important deliverability rates (in percent) for the compared providers. The higher the inbox rate and the lower the spam rate, the better. Amazon SES beats Postmark in this comparison.

Inbox (%)	Spam (%)	Lost (%)
85.90 % 82.11 %	11.02 % 14.01 %	3.08 % 3.88 %

Email deliverability by category

This comparison compares the deliverability taking into account the category or the industry. The deliverability can vary greatly depending on the industry. In this comparison, Amazon SES is the clear winner.

Category	Emails Sent	Emails Inbox	Emails Spam	Emails Lost	Inbox (%)	Spam (%)	Lost (%)
Clothing	4720 4830	4192 4056	419 592	109 182	88.81 % 83.98 %	8.88 % 12.26 %	2.31 % 3.77 %
Elektronics	4776 4784	4171 3986	482 631	123 167	87.33 % 83.32 %	10.09 % 13.19 %	2.58 % 3.49 %
Entertainment	4756 4674	4077 3825	527 665	152 184	85.72 % 81.84 %	11.08 % 14.23 %	3.20 % 3.94 %
Cosmetics & Beauty	4777 4777	4088 3902	535 679	154 196	85.58 % 81.68 %	11.20 % 14.21 %	3.22 % 4.10 %
Food & Drink	4706 4630	4169 3945	421 545	116 140	88.59 % 85.21 %	8.95 % 11.77 %	2.46 % 3.02 %
Home & Garden	4845 4818	4282 4086	438 570	125 162	88.38 % 84.81 %	9.04 % 11.83 %	2.58 % 3.36 %
Finance	4786 4847	3975 3831	635 783	176 233	83.05 % 79.04 %	13.27 % 16.15 %	3.68 % 4.81 %
Health	4729 4745	3993 3829	571 712	165 204	84.44 % 80.70 %	12.07 % 15.01 %	3.49 % 4.30 %
Pets	4720 4821	4094 4013	471 627	155 181	86.74 % 83.24 %	9.98 % 13.01 %	3.28 % 3.75 %
Sport & Fitness	4840 4709	4094 3824	592 710	154 175	84.59 % 81.21 %	12.23 % 15.08 %	3.18 % 3.72 %
Job & Career	4734 4745	3959 3782	620 759	155 204	83.63 % 79.70 %	13.10 % 16.00 %	3.27 % 4.30 %
Dating	4657 4746	3875 3771	613 765	169 210	83.21 % 79.46 %	13.16 % 16.12 %	3.63 % 4.42 %
Other	4763 4951	4125 4123	489 656	149 172	86.61 % 83.28 %	10.27 % 13.25 %	3.13 % 3.47 %

Email deliverability by email service provider

Finally, the following table compares the deliverability taking into account the email service provider. Similar to the industry, also the email service provider can affect the email deliverability in both directions – positive or negative. In this comparison, Amazon SES is better than Postmark.

Provider	Emails Sent	Emails Inbox	Emails Spam	Emails Lost	Inbox (%)	Spam (%)	Lost (%)
Gmail	4826 4728	3870 3610	742 871	214 247	80.19 % 76.35 %	15.38 % 18.42 %	4.43 % 5.22 %
Outlook Mail	4719 4561	3990 3660	586 713	143 188	84.55 % 80.25 %	12.42 % 15.63 %	3.03 % 4.12 %
Yahoo Mail	4812 4764	4106 3877	550 699	156 188	85.33 % 81.38 %	11.43 % 14.67 %	3.24 % 3.95 %
AOL Mail	4619 4865	3947 3963	531 705	141 197	85.45 % 81.46 %	11.50 % 14.49 %	3.05 % 4.05 %
Mail.com	4838 4799	4174 3957	514 651	150 191	86.28 % 82.45 %	10.62 % 13.57 %	3.10 % 3.98 %
Yandex Mail	4778 4676	4004 3761	605 724	169 191	83.80 % 80.43 %	12.66 % 15.48 %	3.54 % 4.08 %
GMX Mail	4720 4739	4138 3982	446 585	136 172	87.67 % 84.03 %	9.45 % 12.34 %	2.88 % 3.63 %
Zoho Mail	4852 4909	4271 4131	455 614	126 164	88.03 % 84.15 %	9.38 % 12.51 %	2.60 % 3.34 %
ProtonMail	4705 4740	4161 4028	414 546	130 166	88.44 % 84.98 %	8.80 % 11.52 %	2.76 % 3.50 %
Custom Mail	4642 4800	4125 4082	410 561	107 157	88.86 % 85.04 %	8.83 % 11.69 %	2.31 % 3.27 %
iCloud Mail	4873 4793	3982 3721	710 844	181 228	81.72 % 77.63 %	14.57 % 17.61 %	3.71 % 4.76 %
Tuta	4698 4930	4132 4153	438 616	128 161	87.95 % 84.24 %	9.32 % 12.49 %	2.72 % 3.27 %
Juno.com	4727 4773	4194 4048	412 565	121 160	88.72 % 84.81 %	8.72 % 11.84 %	2.56 % 3.35 %

Compare Amazon SES with other providers

Compare the email deliverability of Amazon SES with other providers.