Constant Contact and Postmark Email Deliverability Comparison

In this comparison, the deliverability of Constant Contact 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 Postmark than for Constant Contact.

Emails Sent	Emails Inbox	Emails Spam	Emails Lost
402.367 8.760	301.987 7.088	84.582 1.300	15.798 372

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. Postmark beats Constant Contact in this comparison.

Inbox (%)	Spam (%)	Lost (%)
75.05 % 80.91 %	21.02 % 14.84 %	3.93 % 4.25 %

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, Postmark is the clear winner.

Category	Emails Sent	Emails Inbox	Emails Spam	Emails Lost	Inbox (%)	Spam (%)	Lost (%)
Clothing	30976 680	24160 565	5678 90	1138 25	78.00 % 83.09 %	18.33 % 13.24 %	3.67 % 3.68 %
Elektronics	30708 698	23290 582	6280 94	1138 22	75.84 % 83.38 %	20.45 % 13.47 %	3.71 % 3.15 %
Entertainment	30913 677	23150 548	6503 102	1260 27	74.89 % 80.95 %	21.04 % 15.07 %	4.08 % 3.99 %
Cosmetics & Beauty	30980 634	23228 506	6542 99	1210 29	74.98 % 79.81 %	21.12 % 15.62 %	3.91 % 4.57 %
Food & Drink	30988 656	24258 553	5647 85	1083 18	78.28 % 84.30 %	18.22 % 12.96 %	3.49 % 2.74 %
Home & Garden	30946 697	24077 580	5710 88	1159 29	77.80 % 83.21 %	18.45 % 12.63 %	3.75 % 4.16 %
Finance	31323 724	22433 555	7585 123	1305 46	71.62 % 76.66 %	24.22 % 16.99 %	4.17 % 6.35 %
Health	30494 657	22117 523	7128 104	1249 30	72.53 % 79.60 %	23.38 % 15.83 %	4.10 % 4.57 %
Pets	31453 706	24236 576	6044 100	1173 30	77.05 % 81.59 %	19.22 % 14.16 %	3.73 % 4.25 %
Sport & Fitness	31287 621	23098 505	6922 95	1267 21	73.83 % 81.32 %	22.12 % 15.30 %	4.05 % 3.38 %
Job & Career	30585 702	22476 547	6813 120	1296 35	73.49 % 77.92 %	22.28 % 17.09 %	4.24 % 4.99 %
Dating	31242 625	21915 493	7953 103	1374 29	70.15 % 78.88 %	25.46 % 16.48 %	4.40 % 4.64 %
Other	30472 683	23549 555	5777 97	1146 31	77.28 % 81.26 %	18.96 % 14.20 %	3.76 % 4.54 %

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, Postmark is better than Constant Contact.

Provider	Emails Sent	Emails Inbox	Emails Spam	Emails Lost	Inbox (%)	Spam (%)	Lost (%)
Gmail	40118 691	28861 516	9595 135	1662 40	71.94 % 74.67 %	23.92 % 19.54 %	4.14 % 5.79 %
Outlook Mail	39859 657	28875 514	9246 109	1738 34	72.44 % 78.23 %	23.20 % 16.59 %	4.36 % 5.18 %
Yahoo Mail	39996 636	29886 510	8505 99	1605 27	74.72 % 80.19 %	21.26 % 15.57 %	4.01 % 4.25 %
AOL Mail	39056 656	29184 526	8220 102	1652 28	74.72 % 80.18 %	21.05 % 15.55 %	4.23 % 4.27 %
Mail.com	40259 679	30571 557	8129 96	1559 26	75.94 % 82.03 %	20.19 % 14.14 %	3.87 % 3.83 %
Yandex Mail	40334 590	29556 467	9093 98	1685 25	73.28 % 79.15 %	22.54 % 16.61 %	4.18 % 4.24 %
GMX Mail	39713 688	30042 567	8191 93	1480 28	75.65 % 82.41 %	20.63 % 13.52 %	3.73 % 4.07 %
Zoho Mail	40186 691	30900 573	7856 93	1430 25	76.89 % 82.92 %	19.55 % 13.46 %	3.56 % 3.62 %
ProtonMail	40393 678	30993 580	7951 81	1449 17	76.73 % 85.55 %	19.68 % 11.95 %	3.59 % 2.51 %
Custom Mail	40422 692	31547 573	7450 88	1425 31	78.04 % 82.80 %	18.43 % 12.72 %	3.53 % 4.48 %
iCloud Mail	655 651	478 497	136 122	41 32	72.98 % 76.34 %	20.76 % 18.74 %	6.26 % 4.92 %
Tuta	683 746	537 623	107 95	39 28	78.62 % 83.51 %	15.67 % 12.73 %	5.71 % 3.75 %
Juno.com	693 705	557 585	103 89	33 31	80.38 % 82.98 %	14.86 % 12.62 %	4.76 % 4.40 %

Compare Constant Contact with other providers

Compare the email deliverability of Constant Contact with other providers.