FAQ organized by category

SMTP & API

What is an SMTP Relay Service ?

What is SMTP? SMTP stands for Simple Mail Transfer Protocol and it is basically a server to send and receive emails. Normal...

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What's the difference between STMP and API ?

Mailpro allows you to integrate your website, application or ECommerce in different ways, those being SMTP Relay or API. Depending...

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What is the maximum weight of a message sent through SMTP?

Newsletter Weight when using SMTP When sending commercial or transactional emails through the...

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What type of SMTP Server to choose?

Chosing the right SMTP server  To chose the right SMTP server, you must take...

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Where do I find the SMTP authentication credentials in Mailpro

Find the SMTP authentication credentials in Mailpro Mailpro SMTP Relay Server allows you...

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How are statistics collected from an SMTP sending?

SMTP Statistics The statistics pertaining to messages sent through the SMTP server are...

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How to manage Unsubscribe link for SMTP messages?

Learn about Unsubscription links with Mailpro SMTP Placing an unsubscribe link at the...

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How is CC or BCC copy sending handled by SMTP?

The sending of messages in copy and hidden copy through the SMTP server will be managed independently....

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How do I send emails with an SMTP Server?

Learn everything about SMTP sendings with Mailpro SMTP is simply one of the...

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What is new in the API V3?

Our new API V3 is a powerful REST JSON tool designed so that developers can integrate all Mailpro functions with...

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How does Mailpro's API work?

  We set a limit of use to our API to provide the...

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Which SMTP Port to Use?

Which SMTP Port to Use? SMTP port 587 is commonly used for email marketing....

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Is SMTP Protocol Reliable?

SMTP (Simple Mail Transfer Protocol) is a reliable and widely used protocol for sending email messages. SMTP...

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How do APIs work?

How do Email APIs Work? Email APIs (Application Program Interfaces) are a powerful tool for developers that enable them to send...

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What is SMTP Error 554?

554 Rejected   If a script running on event...

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How does the Mailpro API Limit Work?

How does Mailpro API limit works?   We set a...

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Can SMTP Receive Email?

Can SMTP Receive Email? No, SMTP (Simple Mail Transfer Protocol) cannot receive emails; it is designed solely for sending emails. SMTP...

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