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
44.328 44.308	37.888 36.117	5.018 6.404	1.422 1.787

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 (%)
85.47 % 81.51 %	11.32 % 14.45 %	3.21 % 4.03 %

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	3367 3433	2974 2867	308 434	85 132	88.33 % 83.51 %	9.15 % 12.64 %	2.52 % 3.85 %
Elektronics	3485 3414	3026 2823	361 466	98 125	86.83 % 82.69 %	10.36 % 13.65 %	2.81 % 3.66 %
Entertainment	3424 3342	2918 2714	388 492	118 136	85.22 % 81.21 %	11.33 % 14.72 %	3.45 % 4.07 %
Cosmetics & Beauty	3469 3358	2956 2715	398 496	115 147	85.21 % 80.85 %	11.47 % 14.77 %	3.32 % 4.38 %
Food & Drink	3318 3326	2931 2816	305 407	82 103	88.34 % 84.67 %	9.19 % 12.24 %	2.47 % 3.10 %
Home & Garden	3457 3410	3035 2873	322 419	100 118	87.79 % 84.25 %	9.31 % 12.29 %	2.89 % 3.46 %
Finance	3435 3489	2838 2723	468 579	129 187	82.62 % 78.05 %	13.62 % 16.60 %	3.76 % 5.36 %
Health	3419 3338	2870 2671	426 516	123 151	83.94 % 80.02 %	12.46 % 15.46 %	3.60 % 4.52 %
Pets	3333 3502	2878 2892	343 472	112 138	86.35 % 82.58 %	10.29 % 13.48 %	3.36 % 3.94 %
Sport & Fitness	3464 3373	2918 2723	435 521	111 129	84.24 % 80.73 %	12.56 % 15.45 %	3.20 % 3.82 %
Job & Career	3415 3392	2847 2684	456 555	112 153	83.37 % 79.13 %	13.35 % 16.36 %	3.28 % 4.51 %
Dating	3331 3355	2758 2663	448 554	125 138	82.80 % 79.37 %	13.45 % 16.51 %	3.75 % 4.11 %
Other	3411 3576	2939 2953	360 493	112 130	86.16 % 82.58 %	10.55 % 13.79 %	3.28 % 3.64 %

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	3497 3380	2784 2556	547 635	166 189	79.61 % 75.62 %	15.64 % 18.79 %	4.75 % 5.59 %
Outlook Mail	3327 3267	2787 2603	424 527	116 137	83.77 % 79.68 %	12.74 % 16.13 %	3.49 % 4.19 %
Yahoo Mail	3487 3432	2963 2776	406 518	118 138	84.97 % 80.89 %	11.64 % 15.09 %	3.38 % 4.02 %
AOL Mail	3283 3495	2790 2818	390 522	103 155	84.98 % 80.63 %	11.88 % 14.94 %	3.14 % 4.43 %
Mail.com	3482 3428	2979 2808	383 481	120 139	85.55 % 81.91 %	11.00 % 14.03 %	3.45 % 4.05 %
Yandex Mail	3405 3340	2837 2660	444 534	124 146	83.32 % 79.64 %	13.04 % 15.99 %	3.64 % 4.37 %
GMX Mail	3320 3391	2898 2828	322 430	100 133	87.29 % 83.40 %	9.70 % 12.68 %	3.01 % 3.92 %
Zoho Mail	3513 3521	3087 2938	337 457	89 126	87.87 % 83.44 %	9.59 % 12.98 %	2.53 % 3.58 %
ProtonMail	3388 3357	2988 2836	307 398	93 123	88.19 % 84.48 %	9.06 % 11.86 %	2.74 % 3.66 %
Custom Mail	3372 3365	2983 2852	307 408	82 105	88.46 % 84.75 %	9.10 % 12.12 %	2.43 % 3.12 %
iCloud Mail	3517 3409	2862 2622	527 619	128 168	81.38 % 76.91 %	14.98 % 18.16 %	3.64 % 4.93 %
Tuta	3361 3543	2943 2971	320 456	98 116	87.56 % 83.86 %	9.52 % 12.87 %	2.92 % 3.27 %
Juno.com	3376 3380	2987 2849	304 419	85 112	88.48 % 84.29 %	9.00 % 12.40 %	2.52 % 3.31 %

Compare Amazon SES with other providers

Compare the email deliverability of Amazon SES with other providers.