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UniSender
Mail service for automatic and manual mailings. The free plan allows you to send up to 1,500 letters to 100 addresses. No bank card is required to register with this plan.

Unisender Constructor
Creating a letter in Unisender
Possibilities:

clear designer interface;
The audience can be segmented.
Estismail
Another email newsletter platform with a free plan for bases of up to 250 subscribers. Subscriptions start at $15 and can go up to $440 depending on the volume of sending and your goals.

Estismail email templates
Letter templates in the service
Possibilities :

for users on a low tariff there is support;
Basic analytics and reporting functions.
Mailganer
Russian platform for email newsletters, similar in functionality to Mailchimp. The free plan allows you to store a database of up to 2,000 users and send up to 10 thousand letters per month.

Mailganer Builder
Letter Blocks in Mailganer
Possibilities :

there is a free tariff;
built-in analytics to evaluate performance;
You can import a database from other services.
Sendsay
A mailing service with a free tariff of up to 1,000 letters for a base of up to 200 contacts. In addition to email mailings, push notifications and SMS mailings are available.

Creating a letter in Sendsay
Email Builder by Sendsay
Possibilities :

you can send push notifications and SMS for wider coverage;
built-in tools for segmentation and personalization of messages.
There are many more email newsletter services . We have compared their functionality and cost in detail in a separate article.

Check email deliverability
MailTester
An online service that will tell you whether your email will end up in spam. You send a test email to a test address and receive a report with an assessment and recommendations for improvement.

Checking in Mailtester
Simple interface for checking letters
Pros:

You can check your emails without registering;
three checks per day are free;
A detailed report of writing problems and recommendations.
Cons :

no integration with other services;
checks cannot be automated.
Cost : Free for three checks per day. Paid plans start at €50 per month.

GlockApps
A tool for testing deliverability, monitoring sender reputation, and analyzing email content. Allows you to send test emails to various email services and receive detailed delivery reports.

GlockApps deliverability test result
Sample report from GlockApps
Pros :

you can test deliverability to multiple mailboxes;
check if the sender is on blacklists and has low reputation IP addresses;
checking emails for spam triggers;
integration with Google Postmaster.
Cons :

full functionality is available only with a paid subscription;
may be difficult for beginners.
Cost : A few tests are free. Paid plans start at $59 per month when billed annually.

MxToolBox
A set of tools for diagnosing mail servers and analyzing problems list of japan cell phone number with email delivery. The service allows you to check MX records, check blacklists, diagnose SPF and DKIM settings.

MxToolBox service interface
Check interface in MxToolBox
Pros :

several tools for testing;
domain and IP address reputation monitoring;
notifications about delivery and reputation issues.
Cons :

limited functionality in the free version;
The interface can be difficult for beginners.
Cost: Basic tools in the free version. Paid plans start at $129 per month and offer advanced features and monitoring.

Google Postmaster
A free service from Google that keeps reports on the deliverability of emails to Gmail inboxes. Here you can track domain and IP reputation, the percentage of emails that ended up in spam, and other metrics.

Pros :