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
455.754 62.077	344.481 50.973	93.172 8.694	18.101 2.410

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 (%)
75.58 % 82.11 %	20.44 % 14.01 %	3.97 % 3.88 %

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	35042 4830	27485 4056	6251 592	1306 182	78.43 % 83.98 %	17.84 % 12.26 %	3.73 % 3.77 %
Elektronics	34751 4784	26548 3986	6901 631	1302 167	76.39 % 83.32 %	19.86 % 13.19 %	3.75 % 3.49 %
Entertainment	35026 4674	26451 3825	7165 665	1410 184	75.52 % 81.84 %	20.46 % 14.23 %	4.03 % 3.94 %
Cosmetics & Beauty	35062 4777	26483 3902	7197 679	1382 196	75.53 % 81.68 %	20.53 % 14.21 %	3.94 % 4.10 %
Food & Drink	35174 4630	27683 3945	6246 545	1245 140	78.70 % 85.21 %	17.76 % 11.77 %	3.54 % 3.02 %
Home & Garden	35075 4818	27461 4086	6299 570	1315 162	78.29 % 84.81 %	17.96 % 11.83 %	3.75 % 3.36 %
Finance	35400 4847	25579 3831	8325 783	1496 233	72.26 % 79.04 %	23.52 % 16.15 %	4.23 % 4.81 %
Health	34611 4745	25334 3829	7833 712	1444 204	73.20 % 80.70 %	22.63 % 15.01 %	4.17 % 4.30 %
Pets	35515 4821	27532 4013	6653 627	1330 181	77.52 % 83.24 %	18.73 % 13.01 %	3.74 % 3.75 %
Sport & Fitness	35393 4709	26310 3824	7624 710	1459 175	74.34 % 81.21 %	21.54 % 15.08 %	4.12 % 3.72 %
Job & Career	34743 4745	25648 3782	7574 759	1521 204	73.82 % 79.70 %	21.80 % 16.00 %	4.38 % 4.30 %
Dating	35344 4746	25058 3771	8702 765	1584 210	70.90 % 79.46 %	24.62 % 16.12 %	4.48 % 4.42 %
Other	34618 4951	26909 4123	6402 656	1307 172	77.73 % 83.28 %	18.49 % 13.25 %	3.78 % 3.47 %

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	44239 4728	31905 3610	10444 871	1890 247	72.12 % 76.35 %	23.61 % 18.42 %	4.27 % 5.22 %
Outlook Mail	43937 4561	32041 3660	9961 713	1935 188	72.92 % 80.25 %	22.67 % 15.63 %	4.40 % 4.12 %
Yahoo Mail	44012 4764	33068 3877	9170 699	1774 188	75.13 % 81.38 %	20.84 % 14.67 %	4.03 % 3.95 %
AOL Mail	43244 4865	32467 3963	8913 705	1864 197	75.08 % 81.46 %	20.61 % 14.49 %	4.31 % 4.05 %
Mail.com	44440 4799	33930 3957	8781 651	1729 191	76.35 % 82.45 %	19.76 % 13.57 %	3.89 % 3.98 %
Yandex Mail	44557 4676	32851 3761	9829 724	1877 191	73.73 % 80.43 %	22.06 % 15.48 %	4.21 % 4.08 %
GMX Mail	43833 4739	33394 3982	8799 585	1640 172	76.18 % 84.03 %	20.07 % 12.34 %	3.74 % 3.63 %
Zoho Mail	44280 4909	34245 4131	8448 614	1587 164	77.34 % 84.15 %	19.08 % 12.51 %	3.58 % 3.34 %
ProtonMail	44514 4740	34397 4028	8521 546	1596 166	77.27 % 84.98 %	19.14 % 11.52 %	3.59 % 3.50 %
Custom Mail	44546 4800	34950 4082	8021 561	1575 157	78.46 % 85.04 %	18.01 % 11.69 %	3.54 % 3.27 %
iCloud Mail	4663 4793	3484 3721	923 844	256 228	74.72 % 77.63 %	19.79 % 17.61 %	5.49 % 4.76 %
Tuta	4649 4930	3767 4153	685 616	197 161	81.03 % 84.24 %	14.73 % 12.49 %	4.24 % 3.27 %
Juno.com	4840 4773	3982 4048	677 565	181 160	82.27 % 84.81 %	13.99 % 11.84 %	3.74 % 3.35 %

Compare Constant Contact with other providers

Compare the email deliverability of Constant Contact with other providers.