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
70.711 70.968	60.903 58.513	7.663 9.753	2.145 2.702

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 (%)
86.13 % 82.45 %	10.84 % 13.74 %	3.03 % 3.81 %

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	5366 5537	4775 4670	467 662	124 205	88.99 % 84.34 %	8.70 % 11.96 %	2.31 % 3.70 %
Elektronics	5513 5505	4825 4609	546 710	142 186	87.52 % 83.72 %	9.90 % 12.90 %	2.58 % 3.38 %
Entertainment	5474 5319	4714 4371	595 741	165 207	86.12 % 82.18 %	10.87 % 13.93 %	3.01 % 3.89 %
Cosmetics & Beauty	5483 5459	4703 4481	600 760	180 218	85.77 % 82.08 %	10.94 % 13.92 %	3.28 % 3.99 %
Food & Drink	5431 5286	4821 4509	481 615	129 162	88.77 % 85.30 %	8.86 % 11.63 %	2.38 % 3.06 %
Home & Garden	5531 5504	4903 4690	490 635	138 179	88.65 % 85.21 %	8.86 % 11.54 %	2.50 % 3.25 %
Finance	5441 5547	4533 4403	710 882	198 262	83.31 % 79.38 %	13.05 % 15.90 %	3.64 % 4.72 %
Health	5394 5399	4563 4378	643 795	188 226	84.59 % 81.09 %	11.92 % 14.72 %	3.49 % 4.19 %
Pets	5401 5541	4707 4634	528 706	166 201	87.15 % 83.63 %	9.78 % 12.74 %	3.07 % 3.63 %
Sport & Fitness	5481 5361	4646 4375	660 794	175 192	84.77 % 81.61 %	12.04 % 14.81 %	3.19 % 3.58 %
Job & Career	5387 5466	4514 4371	698 862	175 233	83.79 % 79.97 %	12.96 % 15.77 %	3.25 % 4.26 %
Dating	5355 5448	4472 4352	691 862	192 234	83.51 % 79.88 %	12.90 % 15.82 %	3.59 % 4.30 %
Other	5454 5596	4727 4670	554 729	173 197	86.67 % 83.45 %	10.16 % 13.03 %	3.17 % 3.52 %

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	5509 5436	4434 4170	837 988	238 278	80.49 % 76.71 %	15.19 % 18.18 %	4.32 % 5.11 %
Outlook Mail	5392 5238	4570 4220	661 802	161 216	84.76 % 80.57 %	12.26 % 15.31 %	2.99 % 4.12 %
Yahoo Mail	5500 5421	4705 4433	621 778	174 210	85.55 % 81.77 %	11.29 % 14.35 %	3.16 % 3.87 %
AOL Mail	5323 5516	4562 4503	601 787	160 226	85.70 % 81.64 %	11.29 % 14.27 %	3.01 % 4.10 %
Mail.com	5465 5408	4730 4479	569 721	166 208	86.55 % 82.82 %	10.41 % 13.33 %	3.04 % 3.85 %
Yandex Mail	5401 5347	4542 4318	673 814	186 215	84.10 % 80.76 %	12.46 % 15.22 %	3.44 % 4.02 %
GMX Mail	5407 5484	4757 4626	500 665	150 193	87.98 % 84.35 %	9.25 % 12.13 %	2.77 % 3.52 %
Zoho Mail	5584 5625	4922 4750	515 689	147 186	88.14 % 84.44 %	9.22 % 12.25 %	2.63 % 3.31 %
ProtonMail	5388 5409	4781 4615	464 611	143 183	88.73 % 85.32 %	8.61 % 11.30 %	2.65 % 3.38 %
Custom Mail	5329 5524	4744 4718	461 628	124 178	89.02 % 85.41 %	8.65 % 11.37 %	2.33 % 3.22 %
iCloud Mail	5558 5547	4547 4341	802 961	209 245	81.81 % 78.26 %	14.43 % 17.32 %	3.76 % 4.42 %
Tuta	5383 5570	4747 4705	492 682	144 183	88.19 % 84.47 %	9.14 % 12.24 %	2.68 % 3.29 %
Juno.com	5472 5443	4862 4635	467 627	143 181	88.85 % 85.16 %	8.53 % 11.52 %	2.61 % 3.33 %

Compare Amazon SES with other providers

Compare the email deliverability of Amazon SES with other providers.