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
147.513 147.015	126.367 120.909	16.682 20.423	4.268 5.173

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 (%)
85.66 % 82.24 %	11.31 % 13.89 %	2.89 % 3.52 %

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	11186 11277	9819 9443	1097 1406	265 392	87.78 % 83.74 %	9.81 % 12.47 %	2.37 % 3.48 %
Elektronics	11494 11316	9925 9424	1212 1504	317 369	86.35 % 83.28 %	10.54 % 13.29 %	2.76 % 3.26 %
Entertainment	11346 11234	9698 9229	1283 1581	332 384	85.48 % 82.15 %	11.31 % 14.07 %	2.93 % 3.42 %
Cosmetics & Beauty	11330 11222	9693 9250	1275 1584	336 374	85.55 % 82.43 %	11.25 % 14.12 %	2.97 % 3.33 %
Food & Drink	11366 11120	9929 9368	1136 1383	289 332	87.36 % 84.24 %	9.99 % 12.44 %	2.54 % 2.99 %
Home & Garden	11559 11374	10118 9586	1153 1393	289 350	87.53 % 84.28 %	9.97 % 12.25 %	2.50 % 3.08 %
Finance	11214 11390	9400 9148	1434 1768	361 462	83.82 % 80.32 %	12.79 % 15.52 %	3.22 % 4.06 %
Health	11308 11190	9553 9063	1374 1621	360 427	84.48 % 80.99 %	12.15 % 14.49 %	3.18 % 3.82 %
Pets	11313 11339	9786 9439	1204 1493	325 366	86.50 % 83.24 %	10.64 % 13.17 %	2.87 % 3.23 %
Sport & Fitness	11426 11448	9682 9331	1374 1674	351 407	84.74 % 81.51 %	12.03 % 14.62 %	3.07 % 3.56 %
Job & Career	11449 11464	9623 9177	1456 1777	343 461	84.05 % 80.05 %	12.72 % 15.50 %	3.00 % 4.02 %
Dating	11062 11236	9262 9005	1442 1710	369 466	83.73 % 80.14 %	13.04 % 15.22 %	3.34 % 4.15 %
Other	11460 11405	9879 9446	1242 1529	331 383	86.20 % 82.82 %	10.84 % 13.41 %	2.89 % 3.36 %

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	11474 11316	9345 8843	1656 1929	426 504	81.45 % 78.15 %	14.43 % 17.05 %	3.71 % 4.45 %
Outlook Mail	11153 11176	9452 8989	1373 1692	317 431	84.75 % 80.43 %	12.31 % 15.14 %	2.84 % 3.86 %
Yahoo Mail	11456 11164	9776 9116	1320 1606	333 405	85.34 % 81.66 %	11.52 % 14.39 %	2.91 % 3.63 %
AOL Mail	11250 11334	9582 9266	1313 1583	334 416	85.17 % 81.75 %	11.67 % 13.97 %	2.97 % 3.67 %
Mail.com	11442 11147	9830 9200	1253 1496	336 380	85.91 % 82.53 %	10.95 % 13.42 %	2.94 % 3.41 %
Yandex Mail	11194 11157	9448 9033	1392 1672	368 421	84.40 % 80.96 %	12.44 % 14.99 %	3.29 % 3.77 %
GMX Mail	11352 11304	9878 9436	1154 1439	302 376	87.02 % 83.47 %	10.17 % 12.73 %	2.66 % 3.33 %
Zoho Mail	11652 11469	10136 9590	1200 1471	308 358	86.99 % 83.62 %	10.30 % 12.83 %	2.64 % 3.12 %
ProtonMail	11320 11276	9895 9512	1096 1389	292 359	87.41 % 84.36 %	9.68 % 12.32 %	2.58 % 3.18 %
Custom Mail	11274 11489	9903 9705	1108 1423	258 354	87.84 % 84.47 %	9.83 % 12.39 %	2.29 % 3.08 %
iCloud Mail	11349 11321	9388 8998	1571 1836	398 449	82.72 % 79.48 %	13.84 % 16.22 %	3.51 % 3.97 %
Tuta	11332 11402	9877 9558	1167 1461	302 360	87.16 % 83.83 %	10.30 % 12.81 %	2.67 % 3.16 %
Juno.com	11265 11460	9857 9663	1079 1426	294 360	87.50 % 84.32 %	9.58 % 12.44 %	2.61 % 3.14 %

Compare Amazon SES with other providers

Compare the email deliverability of Amazon SES with other providers.