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Questions most frequently asked:
What Type of SMTP Server to Choose?
Choosing the right SMTP server is one of the most consequential technical decisions for any business that sends email at...
Read moreWhat Is the Maximum Weight of a Message Sent Through SMTP?
Mailpro’s SMTP relay accepts messages up to 20 MB total, including the email body, headers and all attachments after Base64 encoding...
Read moreWhat’s the difference between SMTP and API?
Both SMTP and a transactional Email API send messages from your application to your customers, but they take different paths...
Read moreWhat Is an SMTP Relay Service and How Does It Work?
An SMTP relay service is a managed outgoing mail server that sends email on behalf of your application, website, CRM...
Read moreWhy Does My Email Look Strange on Outlook?
Outlook is the email client most likely to make your beautiful campaign look broken — clipped images, lost background colors,...
Read moreWhat Is IP Reputation and Why Does It Matter?
IP reputation is the trust score that mailbox providers (Gmail, Yahoo, Outlook, Apple Mail) assign to the IP address that...
Read moreFile Sizes and Extensions Supported by Mailpro Builder
The Mailpro Builder accepts a wide range of file types for images, attachments and downloadable resources. Each type has a...
Read moreMSISDN: Definition and Format (CC+NDC+SN)
MSISDN stands for Mobile Station International Subscriber Directory Number. It is the worldwide format your SMS gateway uses to identify...
Read moreHow to Schedule an SMS Campaign with Mailpro
Scheduling an SMS campaign in Mailpro lets you prepare the message in advance and have it delivered at the exact...
Read moreHow to Import Your SMS Phone List
Before launching your first SMS campaign in Mailpro, you need to import your phone list correctly. Follow these steps to...
Read moreHow to Send an Email as SMS with Mailpro: Gateway Guide
Mailpro’s Email-to-SMS gateway lets you trigger an SMS just by sending an email. The gateway converts the email into a...
Read moreHow to Personalize Your SMS With Mailpro
Personalized SMS messages outperform generic ones by 2–4× on click and reply rates. Mailpro’s SMS platform supports merge tags so...
Read moreCountry Phone Codes List for SMS Marketing
To send an SMS through Mailpro, every mobile number in your contact list must be in international (E.164) format: a...
Read moreHow to Use Mailpro’s Double Opt-In Functionality
Activating Mailpro’s double opt-in feature is the safest way to grow a clean, GDPR-compliant subscriber list. This guide walks you...
Read moreWhat Is a Double Opt-in Subscription?
A double opt-in subscription is a two-step sign-up: the person enters their email address in your form, then confirms it...
Read moreHow to Configure DMARC With Mailpro: 5-Step Safe Rollout
Setting up a DMARC record with Mailpro is the third pillar of email authentication, after SPF and DKIM. Done right,...
Read moreWhat Is a DMARC Record and How to Use It?
DMARC (Domain-based Message Authentication, Reporting and Conformance) is the email authentication standard that ties SPF and DKIM together and tells...
Read moreHow to Configure DKIM With Mailpro: 4 Easy Steps
Configuring DKIM with Mailpro takes about ten minutes and pays off immediately: signed messages, higher inbox placement and protection against...
Read moreWhat Is a DKIM Record?
DKIM (DomainKeys Identified Mail) is an email authentication method that lets a sender attach a cryptographic signature to every outgoing...
Read moreHow to Configure SPF With Mailpro: 5-Step Guide
Configuring SPF with Mailpro is a 5-minute job that pays off immediately: better inbox placement, fewer bounces and protection against...
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