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
464.675 70.968	351.590 58.513	94.581 9.753	18.504 2.702

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 (%)
75.66 % 82.45 %	20.35 % 13.74 %	3.98 % 3.81 %

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	35727 5537	28052 4670	6347 662	1328 205	78.52 % 84.34 %	17.77 % 11.96 %	3.72 % 3.70 %
Elektronics	35461 5505	27120 4609	7006 710	1335 186	76.48 % 83.72 %	19.76 % 12.90 %	3.76 % 3.38 %
Entertainment	35681 5319	26967 4371	7271 741	1443 207	75.58 % 82.18 %	20.38 % 13.93 %	4.04 % 3.89 %
Cosmetics & Beauty	35744 5459	27021 4481	7307 760	1416 218	75.60 % 82.08 %	20.44 % 13.92 %	3.96 % 3.99 %
Food & Drink	35835 5286	28231 4509	6336 615	1268 162	78.78 % 85.30 %	17.68 % 11.63 %	3.54 % 3.06 %
Home & Garden	35736 5504	28004 4690	6390 635	1342 179	78.36 % 85.21 %	17.88 % 11.54 %	3.76 % 3.25 %
Finance	36106 5547	26129 4403	8451 882	1526 262	72.37 % 79.38 %	23.41 % 15.90 %	4.23 % 4.72 %
Health	35266 5399	25854 4378	7940 795	1472 226	73.31 % 81.09 %	22.51 % 14.72 %	4.17 % 4.19 %
Pets	36215 5541	28096 4634	6755 706	1364 201	77.58 % 83.63 %	18.65 % 12.74 %	3.77 % 3.63 %
Sport & Fitness	36116 5361	26879 4375	7746 794	1491 192	74.42 % 81.61 %	21.45 % 14.81 %	4.13 % 3.58 %
Job & Career	35458 5466	26203 4371	7699 862	1556 233	73.90 % 79.97 %	21.71 % 15.77 %	4.39 % 4.26 %
Dating	36050 5448	25599 4352	8831 862	1620 234	71.01 % 79.88 %	24.50 % 15.82 %	4.49 % 4.30 %
Other	35280 5596	27435 4670	6502 729	1343 197	77.76 % 83.45 %	18.43 % 13.03 %	3.81 % 3.52 %

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	44943 5436	32430 4170	10589 988	1924 278	72.16 % 76.71 %	23.56 % 18.18 %	4.28 % 5.11 %
Outlook Mail	44648 5238	32601 4220	10084 802	1963 216	73.02 % 80.57 %	22.59 % 15.31 %	4.40 % 4.12 %
Yahoo Mail	44741 5421	33650 4433	9288 778	1803 210	75.21 % 81.77 %	20.76 % 14.35 %	4.03 % 3.87 %
AOL Mail	43892 5516	32975 4503	9019 787	1898 226	75.13 % 81.64 %	20.55 % 14.27 %	4.32 % 4.10 %
Mail.com	45122 5408	34478 4479	8886 721	1758 208	76.41 % 82.82 %	19.69 % 13.33 %	3.90 % 3.85 %
Yandex Mail	45262 5347	33399 4318	9950 814	1913 215	73.79 % 80.76 %	21.98 % 15.22 %	4.23 % 4.02 %
GMX Mail	44538 5484	33970 4626	8898 665	1670 193	76.27 % 84.35 %	19.98 % 12.13 %	3.75 % 3.52 %
Zoho Mail	44928 5625	34771 4750	8541 689	1616 186	77.39 % 84.44 %	19.01 % 12.25 %	3.60 % 3.31 %
ProtonMail	45185 5409	34954 4615	8611 611	1620 183	77.36 % 85.32 %	19.06 % 11.30 %	3.59 % 3.38 %
Custom Mail	45252 5524	35527 4718	8116 628	1609 178	78.51 % 85.41 %	17.94 % 11.37 %	3.56 % 3.22 %
iCloud Mail	5341 5547	3987 4341	1053 961	301 245	74.65 % 78.26 %	19.72 % 17.32 %	5.64 % 4.42 %
Tuta	5338 5570	4328 4705	783 682	227 183	81.08 % 84.47 %	14.67 % 12.24 %	4.25 % 3.29 %
Juno.com	5485 5443	4520 4635	763 627	202 181	82.41 % 85.16 %	13.91 % 11.52 %	3.68 % 3.33 %

Compare Constant Contact with other providers

Compare the email deliverability of Constant Contact with other providers.