Postmark and Constant Contact Email Deliverability Comparison

Postmark

Constant Contact

In this comparison, the deliverability of Postmark and Constant Contact 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
77.301 77.346	59.644 59.160	15.881 16.331	1.776 1.855

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 (%)
77.16 % 76.49 %	20.54 % 21.11 %	2.30 % 2.40 %

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	6223 6015	4769 4536	1314 1321	140 158	76.64 % 75.41 %	21.12 % 21.96 %	2.25 % 2.63 %
Elektronics	5871 6084	4570 4706	1167 1241	134 137	77.84 % 77.35 %	19.88 % 20.40 %	2.28 % 2.25 %
Entertainment	5960 5962	4591 4530	1247 1296	122 136	77.03 % 75.98 %	20.92 % 21.74 %	2.05 % 2.28 %
Cosmetics & Beauty	5909 5949	4594 4622	1189 1188	126 139	77.75 % 77.69 %	20.12 % 19.97 %	2.13 % 2.34 %
Food & Drink	5893 5806	4518 4417	1249 1254	126 135	76.67 % 76.08 %	21.19 % 21.60 %	2.14 % 2.33 %
Home & Garden	6020 5795	4626 4396	1255 1256	139 143	76.84 % 75.86 %	20.85 % 21.67 %	2.31 % 2.47 %
Finance	5866 5969	4707 4754	1016 1065	143 150	80.24 % 79.64 %	17.32 % 17.84 %	2.44 % 2.51 %
Health	6028 6045	4852 4774	1041 1129	135 142	80.49 % 78.97 %	17.27 % 18.68 %	2.24 % 2.35 %
Pets	6083 6004	4634 4560	1310 1295	139 149	76.18 % 75.95 %	21.54 % 21.57 %	2.29 % 2.48 %
Sport & Fitness	5716 5946	4412 4551	1165 1258	139 137	77.19 % 76.54 %	20.38 % 21.16 %	2.43 % 2.30 %
Job & Career	5918 6056	4407 4472	1369 1444	142 140	74.47 % 73.84 %	23.13 % 23.84 %	2.40 % 2.31 %
Dating	5907 5776	4330 4195	1439 1438	138 143	73.30 % 72.63 %	24.36 % 24.90 %	2.34 % 2.48 %
Other	5907 5939	4634 4647	1120 1146	153 146	78.45 % 78.25 %	18.96 % 19.30 %	2.59 % 2.46 %

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	5360 5532	3949 4057	1278 1345	133 130	73.68 % 73.34 %	23.84 % 24.31 %	2.48 % 2.35 %
Outlook Mail	5461 5594	4108 4159	1232 1303	121 132	75.22 % 74.35 %	22.56 % 23.29 %	2.22 % 2.36 %
Yahoo Mail	5550 5503	4209 4172	1223 1203	118 128	75.84 % 75.81 %	22.04 % 21.86 %	2.13 % 2.33 %
AOL Mail	5429 5586	4148 4225	1153 1218	128 143	76.40 % 75.64 %	21.24 % 21.80 %	2.36 % 2.56 %
Mail.com	5528 5356	4361 4161	1042 1066	125 129	78.89 % 77.69 %	18.85 % 19.90 %	2.26 % 2.41 %
Yandex Mail	5569 5541	4255 4195	1192 1217	122 129	76.41 % 75.71 %	21.40 % 21.96 %	2.19 % 2.33 %
GMX Mail	5418 5598	4051 4176	1244 1284	123 138	74.77 % 74.60 %	22.96 % 22.94 %	2.27 % 2.47 %
Zoho Mail	5521 5425	4308 4188	1088 1100	125 137	78.03 % 77.20 %	19.71 % 20.28 %	2.26 % 2.53 %
ProtonMail	5639 5479	4482 4288	1032 1054	125 137	79.48 % 78.26 %	18.30 % 19.24 %	2.22 % 2.50 %
Custom Mail	5386 5494	4313 4373	957 988	116 133	80.08 % 79.60 %	17.77 % 17.98 %	2.15 % 2.42 %
iCloud Mail	5534 5331	4043 3899	1354 1307	137 125	73.06 % 73.14 %	24.47 % 24.52 %	2.48 % 2.34 %
Tuta	5675 5735	4483 4484	1062 1124	130 127	79.00 % 78.19 %	18.71 % 19.60 %	2.29 % 2.21 %
Juno.com	5728 5660	4584 4450	998 1073	146 137	80.03 % 78.62 %	17.42 % 18.96 %	2.55 % 2.42 %
Mailfence	5503 5512	4350 4333	1026 1049	127 130	79.05 % 78.61 %	18.64 % 19.03 %	2.31 % 2.36 %

Compare Postmark with other providers

Compare the email deliverability of Postmark with other providers.