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
76.798 77.510	59.444 59.481	15.641 16.188	1.713 1.841

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 (%)
77.40 % 76.74 %	20.37 % 20.89 %	2.23 % 2.38 %

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	6023 5944	4621 4513	1271 1272	131 159	76.72 % 75.93 %	21.10 % 21.40 %	2.17 % 2.67 %
Elektronics	5836 5884	4530 4526	1176 1229	130 129	77.62 % 76.92 %	20.15 % 20.89 %	2.23 % 2.19 %
Entertainment	5800 5842	4456 4463	1225 1241	119 138	76.83 % 76.40 %	21.12 % 21.24 %	2.05 % 2.36 %
Cosmetics & Beauty	5908 6241	4597 4839	1184 1259	127 143	77.81 % 77.54 %	20.04 % 20.17 %	2.15 % 2.29 %
Food & Drink	5933 5830	4555 4446	1256 1251	122 133	76.77 % 76.26 %	21.17 % 21.46 %	2.06 % 2.28 %
Home & Garden	6024 5786	4641 4414	1249 1226	134 146	77.04 % 76.29 %	20.73 % 21.19 %	2.22 % 2.52 %
Finance	6100 6092	4945 4874	1013 1070	142 148	81.07 % 80.01 %	16.61 % 17.56 %	2.33 % 2.43 %
Health	6121 5925	4955 4712	1027 1083	139 130	80.95 % 79.53 %	16.78 % 18.28 %	2.27 % 2.19 %
Pets	6016 5939	4606 4529	1275 1267	135 143	76.56 % 76.26 %	21.19 % 21.33 %	2.24 % 2.41 %
Sport & Fitness	5696 5982	4426 4600	1145 1245	125 137	77.70 % 76.90 %	20.10 % 20.81 %	2.19 % 2.29 %
Job & Career	5828 6109	4344 4537	1351 1439	133 133	74.54 % 74.27 %	23.18 % 23.56 %	2.28 % 2.18 %
Dating	5816 5928	4275 4307	1409 1471	132 150	73.50 % 72.66 %	24.23 % 24.81 %	2.27 % 2.53 %
Other	5697 6008	4493 4721	1060 1135	144 152	78.87 % 78.58 %	18.61 % 18.89 %	2.53 % 2.53 %

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	5291 5523	3899 4063	1274 1332	118 128	73.69 % 73.57 %	24.08 % 24.12 %	2.23 % 2.32 %
Outlook Mail	5439 5505	4102 4127	1216 1245	121 133	75.42 % 74.97 %	22.36 % 22.62 %	2.22 % 2.42 %
Yahoo Mail	5571 5699	4230 4311	1222 1247	119 141	75.93 % 75.64 %	21.94 % 21.88 %	2.14 % 2.47 %
AOL Mail	5502 5519	4233 4197	1137 1189	132 133	76.94 % 76.05 %	20.67 % 21.54 %	2.40 % 2.41 %
Mail.com	5715 5656	4517 4395	1074 1128	124 133	79.04 % 77.71 %	18.79 % 19.94 %	2.17 % 2.35 %
Yandex Mail	5557 5614	4241 4249	1193 1244	123 121	76.32 % 75.69 %	21.47 % 22.16 %	2.21 % 2.16 %
GMX Mail	5337 5503	4004 4138	1212 1236	121 129	75.02 % 75.20 %	22.71 % 22.46 %	2.27 % 2.34 %
Zoho Mail	5427 5515	4225 4277	1085 1100	117 138	77.85 % 77.55 %	19.99 % 19.95 %	2.16 % 2.50 %
ProtonMail	5458 5421	4373 4234	975 1051	110 136	80.12 % 78.10 %	17.86 % 19.39 %	2.02 % 2.51 %
Custom Mail	5333 5419	4300 4313	914 981	119 125	80.63 % 79.59 %	17.14 % 18.10 %	2.23 % 2.31 %
iCloud Mail	5380 5464	3973 4049	1279 1286	128 129	73.85 % 74.10 %	23.77 % 23.54 %	2.38 % 2.36 %
Tuta	5717 5673	4544 4460	1046 1079	127 134	79.48 % 78.62 %	18.30 % 19.02 %	2.22 % 2.36 %
Juno.com	5712 5601	4540 4421	1033 1047	139 133	79.48 % 78.93 %	18.08 % 18.69 %	2.43 % 2.37 %
Mailfence	5359 5398	4263 4247	981 1023	115 128	79.55 % 78.68 %	18.31 % 18.95 %	2.15 % 2.37 %

Compare Postmark with other providers

Compare the email deliverability of Postmark with other providers.