How can we help you today?
Questions most frequently asked:
File upload: how and why we rename your files
When you upload an image or document to your Mailpro account, the original filename is replaced by a unique random...
Read moreHow to Reduce Your SpamAssassin Score
At Mailpro, we use SpamAssassin to evaluate every campaign before it goes out — both the email content and the...
Read moreHow to enable password-protected forms and surveys
Mailpro lets you lock any form, survey or quiz behind a password so only the people you choose can answer....
Read moreInternet Explorer 11 is no longer supported by Mailpro
Microsoft retired Internet Explorer 11 in 2022, and Mailpro has followed by removing IE11 from its list of supported browsers....
Read moreHow Long Do We Keep Your Data?
Mailpro keeps your data only as long as it is needed for the services you use, your legal obligations, and...
Read moreWhat is a user agent and how does Mailpro use it?
A user agent is the identifier a web browser or email client sends to a server so it can introduce...
Read moreWhat is a dedicated IP?
A dedicated IP is an IP address used exclusively by a single Mailpro sender. Unlike a shared IP, where reputation...
Read moreWhy isn´t my form online anymore?
If your Mailpro form has suddenly stopped working, the most common cause is that your subscription has expired or your...
Read moreWhat Is SMTP Error 554 and How to Fix It?
SMTP error 554 is a permanent rejection: the recipient server refused to accept your email. The good news? Once you...
Read moreIs SMTP protocol reliable?
Yes — SMTP is one of the most reliable application protocols on the internet. It runs over TCP, supports retries,...
Read moreWhich SMTP port to use?
SMTP uses several ports, but only two of them really matter for sending email today: 587 (with STARTTLS) and 465...
Read moreHow Does the Mailpro API Work?
Mailpro’s API lets developers send transactional and marketing emails directly from their software, without going through the web interface. Access...
Read moreWhat is a drag and drop editor?
A drag-and-drop editor is a visual newsletter builder where you assemble an email by dragging blocks — text, images, buttons,...
Read moreHow can I increase my opening rate?
Open rate goes up when three things line up: the right person, the right inbox, and a subject line worth...
Read moreWhat are some common email marketing metrics?
The metrics that matter in email marketing all answer the same question: did your message reach the right people, and...
Read moreHow do you get your Mailpro account validated?
Validating your Mailpro account is the step that turns your trial into a fully active sender account — lifting send...
Read moreHow to write a great email subject line?
The subject line is the only sentence that decides whether your email gets opened. A great one is short, specific...
Read moreWhat is the best day to send my newsletter?
The honest answer: there is no universal best day — only a best day for your audience. Industry studies put...
Read moreShould I segment my email list?
Yes — segmenting your email list is one of the highest-leverage things you can do. A segmented send is targeted...
Read moreTips for creating a newsletter with good content
Good newsletter content respects three things: the subscriber’s time, their inbox and their reason for signing up. Strip out everything...
Read more