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
540.483 147.015	412.262 120.909	107.687 20.423	21.069 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. Postmark beats Constant Contact in this comparison.

Inbox (%)	Spam (%)	Lost (%)
76.28 % 82.24 %	19.92 % 13.89 %	3.90 % 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, Postmark is the clear winner.

Category	Emails Sent	Emails Inbox	Emails Spam	Emails Lost	Inbox (%)	Spam (%)	Lost (%)
Clothing	41392 11277	32657 9443	7282 1406	1516 392	78.90 % 83.74 %	17.59 % 12.47 %	3.66 % 3.48 %
Elektronics	41334 11316	31860 9424	7982 1504	1525 369	77.08 % 83.28 %	19.31 % 13.29 %	3.69 % 3.26 %
Entertainment	41622 11234	31703 9229	8295 1581	1627 384	76.17 % 82.15 %	19.93 % 14.07 %	3.91 % 3.42 %
Cosmetics & Beauty	41603 11222	31719 9250	8337 1584	1612 374	76.24 % 82.43 %	20.04 % 14.12 %	3.87 % 3.33 %
Food & Drink	41617 11120	32927 9368	7308 1383	1447 332	79.12 % 84.24 %	17.56 % 12.44 %	3.48 % 2.99 %
Home & Garden	41806 11374	32922 9586	7393 1393	1550 350	78.75 % 84.28 %	17.68 % 12.25 %	3.71 % 3.08 %
Finance	41990 11390	30775 9148	9514 1768	1751 462	73.29 % 80.32 %	22.66 % 15.52 %	4.17 % 4.06 %
Health	41038 11190	30441 9063	8947 1621	1675 427	74.18 % 80.99 %	21.80 % 14.49 %	4.08 % 3.82 %
Pets	42146 11339	32859 9439	7759 1493	1559 366	77.96 % 83.24 %	18.41 % 13.17 %	3.70 % 3.23 %
Sport & Fitness	41859 11448	31437 9331	8771 1674	1692 407	75.10 % 81.51 %	20.95 % 14.62 %	4.04 % 3.56 %
Job & Career	41297 11464	30826 9177	8756 1777	1760 461	74.64 % 80.05 %	21.20 % 15.50 %	4.26 % 4.02 %
Dating	41795 11236	30105 9005	9894 1710	1829 466	72.03 % 80.14 %	23.67 % 15.22 %	4.38 % 4.15 %
Other	40984 11405	32031 9446	7449 1529	1526 383	78.15 % 82.82 %	18.18 % 13.41 %	3.72 % 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, Postmark is better than Constant Contact.

Provider	Emails Sent	Emails Inbox	Emails Spam	Emails Lost	Inbox (%)	Spam (%)	Lost (%)
Gmail	50783 11316	36942 8843	11716 1929	2164 504	72.74 % 78.15 %	23.07 % 17.05 %	4.26 % 4.45 %
Outlook Mail	50592 11176	37299 8989	11167 1692	2163 431	73.73 % 80.43 %	22.07 % 15.14 %	4.28 % 3.86 %
Yahoo Mail	50611 11164	38304 9116	10344 1606	2014 405	75.68 % 81.66 %	20.44 % 14.39 %	3.98 % 3.63 %
AOL Mail	49605 11334	37561 9266	10008 1583	2072 416	75.72 % 81.75 %	20.18 % 13.97 %	4.18 % 3.67 %
Mail.com	51145 11147	39324 9200	9909 1496	1950 380	76.89 % 82.53 %	19.37 % 13.42 %	3.81 % 3.41 %
Yandex Mail	51255 11157	38151 9033	11062 1672	2129 421	74.43 % 80.96 %	21.58 % 14.99 %	4.15 % 3.77 %
GMX Mail	50233 11304	38550 9436	9835 1439	1862 376	76.74 % 83.47 %	19.58 % 12.73 %	3.71 % 3.33 %
Zoho Mail	50707 11469	39469 9590	9484 1471	1801 358	77.84 % 83.62 %	18.70 % 12.83 %	3.55 % 3.12 %
ProtonMail	50988 11276	39687 9512	9564 1389	1803 359	77.84 % 84.36 %	18.76 % 12.32 %	3.54 % 3.18 %
Custom Mail	50909 11489	40142 9705	9036 1423	1784 354	78.85 % 84.47 %	17.75 % 12.39 %	3.50 % 3.08 %
iCloud Mail	11115 11321	8481 8998	2148 1836	533 449	76.30 % 79.48 %	19.33 % 16.22 %	4.80 % 3.97 %
Tuta	11128 11402	9001 9558	1722 1461	420 360	80.89 % 83.83 %	15.47 % 12.81 %	3.77 % 3.16 %
Juno.com	11412 11460	9351 9663	1692 1426	374 360	81.94 % 84.32 %	14.83 % 12.44 %	3.28 % 3.14 %

Compare Constant Contact with other providers

Compare the email deliverability of Constant Contact with other providers.