Microsoft 365 / Outlook.com One-Click Setup
Learn how to easily setup the Outlook mailer using one-click authentication.
Error: Email Sending Limit
Overview The ‘Email sending limit’ error occurs on sites sending emails through an SMTP server. It indicates that you’ve exceeded the limit allocated to you by your email service provider. Causes It is often caused by limits on your SMTP account and not the SMTP configuration itself. Most email service providers enforce rate limits on […]
Error: Connection Refused
Overview The ‘Connection refused’ error occurs when your SMTP plugin fails to connect to the mail server you configured on port 25. This error often happens with the Other SMTP mailer in an SMTP plugin like WP Mail SMTP. Causes The error usually occurs due to the security settings on your web hosting server and […]
SMTP Error: ErrorSendAsDenied
Overview The ‘ErrorSendAsDenied’ issue often occurs when setting up your website to send emails using Microsoft’s API. This error can prevent emails from being sent successfully through your site when using Microsoft as your mailer. Causes The main cause of the ‘ErrorSendAsDenied’ error is mismatched email addresses. When setting up the Microsoft mailer in an […]
Error 452-4.5.3: Domain policy size per transaction exceeded
Overview The ‘Error 452-4.5.3’ often occurs when the email you’re trying to send exceeds the limit set by the recipient’s email server or your domain’s policy. This error can prevent emails from being sent successfully through your site. Particularly when dealing with large attachments or numerous recipients. Causes There are two main reasons why the […]
SMTP Error 447
Overview SMTP Error 447 occurs when an email exceeds the recipient limit set by the mail server. This error can prevent emails from being sent successfully through your site, particularly when sending to a large number of recipients at once. Causes The main cause of the SMTP error 447 issue is exceeding recipient limits. Some […]