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Cómo solucionar el error SMTP 535-5.7.8: Usuario/Contraseña no aceptados

Text on a white and orange gradient background reads: Como solucionar el error SMTP 535-5.7.8: Usuario/ContraseƱa no aceptados.

ĀæAlguna vez has intentado enviar un correo electrónico y te has topado con el mensaje “535-5.7.8: Nombre de usuario o contraseƱa no aceptados”? Este error estĆ” relacionado con el protocolo simple de transferencia de correo (SMTP, por sus siglas en inglĆ©s), el sistema utilizado globalmente para el envĆ­o de mensajes electrónicos. En otras palabras, significa […]

Don’t Let Your Emails Get Spoofed: How a DMARC Generator Helps

A graphic with the text Don’t Let Your Emails Get Spoofed: How a DMARC Generator Helps alongside a partial screenshot of a DMARC record creation tool.

Email spoofing is possibly the biggest danger in email marketing. Not only does it put recipients at risk, it can also destroy a brand’s image and email deliverability. Cybercriminals frequently pose as business or individuals in order to defraud receivers, capture sensitive data, or infect them with malware—in Q4 of 2024 alone, there were over 989,000 […]

How to Use an SPF Generator to Protect Your Domain and Improve Inboxing

A graphic with the text How to Use an SPF Generator to Protect Your Domain and Improve Inboxing next to a partial screenshot of SPF records showing logos for Gmail, AWS, Mailchimp, and others.

Email is one of the most powerful tools for communication. However spam, phishing, and spoofing continue to be an ongoing risk not only to your domain’s reputation, but also to your email deliverability. Of the more than 3.4 billion emails sent daily with good enough forgery to make them look like they are from someone you […]

Why Your Emails Aren’t Reaching Inboxes

A graphic with the text ā€œWhy Your Emails Aren’t Reaching Inboxes (and How to Test Deliverability Fast)ā€ next to a blurry screenshot of an email deliverability report showing a score and statistics.

When emails vanish, the outrage is understandable. You’ve spent hours putting together the perfect email. The subject is attention-getting, the design is beautiful and your offer…? Spot on. You hit send, you wait … and then comes the letdown. Open rates are down. Responses are nowhere to be found. Some contacts even say they found your message languishing in […]

5 Warning Signs Your Email Deliverability Is Suffering

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You spend so much time brainstorming and executing the most creative email campaign you’ve done to date. You’ve set up your workflows and sequences to be as detailed as possible—taking into account all possible behaviors of your target audience. But you’re not getting the results you want. To make matters worse, you find out from […]

The Ultimate Guide to Understanding and Improving Domain Reputation

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Email domain reputation affects the deliverability of email messages, meaning how likely it is that a recipient will receive your emails.Ā  Good email domain reputation helps give you peace of mind knowing that your contacts are getting the important messages you’re sending their way – whether they be transactional or promotional in nature.Ā  However, if […]

Best Email Warm-Up Tools for Gmail

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Email is without a doubt an insanely effective tool when it comes to marketing your business. Among email providers, Gmail stands out with over 1.8 billion active users globally. In the United States, Gmail holds a dominant 75.78% market share, equating to roughly 130.9 million users. These numbers reveal that many of your prospects and customers […]

Improve Email Deliverability in Outlook

Illustration of an anthropomorphic tiger wearing a black warmy shirt, standing with crossed arms next to the text Improve Email Deliverability in Outlook on a white background with orange grid lines in the top right corner.

Microsoft Outlook is used by over 400 million active email users around the world, and serves as one of the most popular email platforms for businesses and general consumers. But with Outlook’s aggressive spam filters and intricate security precautions, getting your emails delivered could be quite difficult. For businesses relying on Outlook to communicate with their customers, […]

How Long Does It Take to Warm Up an Email Domain for Fintech Companies

Illustration of a confident tiger mascot in a Warmy shirt standing with folded arms. Text asks, How long does it take to warm up an email domain for fintech companies? in blue and orange font on a white background.

Email is essential for fintech businesses when it comes to communicating with prospects, customers, and partners. In addition to being a deeply niche industry, fintech also comes with the responsibility of handling private user information. Therefore, trust and credibility are, above all else, significant. If you’re a fintech company with cold outreach campaigns or transactional messages, […]

SMTP Email Error 552 5.7.0 – How to Resolve [SOLVED]

552 5.7.0

Simple Mail Transfer Protocol is an essential part of email communication. It is an agent responsible for sending and receiving electronic mail throughout the internet. Once an email is written and sent, the SMTP server is responsible for forwarding and ensuring its secure reception. Thus, when this error occurs, it hinders the effective sending and […]