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
438.027 44.308	330.244 36.117	90.425 6.404	17.358 1.787

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 (%)
75.39 % 81.51 %	20.64 % 14.45 %	3.96 % 4.03 %

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	33667 3433	26349 2867	6066 434	1252 132	78.26 % 83.51 %	18.02 % 12.64 %	3.72 % 3.85 %
Elektronics	33415 3414	25454 2823	6709 466	1252 125	76.18 % 82.69 %	20.08 % 13.65 %	3.75 % 3.66 %
Entertainment	33654 3342	25335 2714	6954 492	1365 136	75.28 % 81.21 %	20.66 % 14.72 %	4.06 % 4.07 %
Cosmetics & Beauty	33691 3358	25389 2715	6984 496	1318 147	75.36 % 80.85 %	20.73 % 14.77 %	3.91 % 4.38 %
Food & Drink	33730 3326	26488 2816	6044 407	1198 103	78.53 % 84.67 %	17.92 % 12.24 %	3.55 % 3.10 %
Home & Garden	33744 3410	26361 2873	6115 419	1268 118	78.12 % 84.25 %	18.12 % 12.29 %	3.76 % 3.46 %
Finance	34034 3489	24516 2723	8084 579	1434 187	72.03 % 78.05 %	23.75 % 16.60 %	4.21 % 5.36 %
Health	33220 3338	24247 2671	7604 516	1369 151	72.99 % 80.02 %	22.89 % 15.46 %	4.12 % 4.52 %
Pets	34152 3502	26407 2892	6455 472	1290 138	77.32 % 82.58 %	18.90 % 13.48 %	3.78 % 3.94 %
Sport & Fitness	34038 3373	25245 2723	7395 521	1398 129	74.17 % 80.73 %	21.73 % 15.45 %	4.11 % 3.82 %
Job & Career	33428 3392	24634 2684	7343 555	1451 153	73.69 % 79.13 %	21.97 % 16.36 %	4.34 % 4.51 %
Dating	34008 3355	24034 2663	8468 554	1506 138	70.67 % 79.37 %	24.90 % 16.51 %	4.43 % 4.11 %
Other	33246 3576	25785 2953	6204 493	1257 130	77.56 % 82.58 %	18.66 % 13.79 %	3.78 % 3.64 %

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	42858 3380	30887 2556	10167 635	1804 189	72.07 % 75.62 %	23.72 % 18.79 %	4.21 % 5.59 %
Outlook Mail	42630 3267	31015 2603	9740 527	1875 137	72.75 % 79.68 %	22.85 % 16.13 %	4.40 % 4.19 %
Yahoo Mail	42656 3432	31978 2776	8946 518	1732 138	74.97 % 80.89 %	20.97 % 15.09 %	4.06 % 4.02 %
AOL Mail	41862 3495	31371 2818	8692 522	1799 155	74.94 % 80.63 %	20.76 % 14.94 %	4.30 % 4.43 %
Mail.com	43040 3428	32797 2808	8571 481	1672 139	76.20 % 81.91 %	19.91 % 14.03 %	3.88 % 4.05 %
Yandex Mail	43141 3340	31731 2660	9594 534	1816 146	73.55 % 79.64 %	22.24 % 15.99 %	4.21 % 4.37 %
GMX Mail	42456 3391	32271 2828	8603 430	1582 133	76.01 % 83.40 %	20.26 % 12.68 %	3.73 % 3.92 %
Zoho Mail	42893 3521	33094 2938	8256 457	1543 126	77.15 % 83.44 %	19.25 % 12.98 %	3.60 % 3.58 %
ProtonMail	43164 3357	33274 2836	8345 398	1545 123	77.09 % 84.48 %	19.33 % 11.86 %	3.58 % 3.66 %
Custom Mail	43176 3365	33800 2852	7842 408	1534 105	78.28 % 84.75 %	18.16 % 12.12 %	3.55 % 3.12 %
iCloud Mail	3319 3409	2465 2622	667 619	187 168	74.27 % 76.91 %	20.10 % 18.16 %	5.63 % 4.93 %
Tuta	3385 3543	2739 2971	508 456	138 116	80.92 % 83.86 %	15.01 % 12.87 %	4.08 % 3.27 %
Juno.com	3447 3380	2822 2849	494 419	131 112	81.87 % 84.29 %	14.33 % 12.40 %	3.80 % 3.31 %

Compare Constant Contact with other providers

Compare the email deliverability of Constant Contact with other providers.