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Category: Email

SMTP Error 550 – Message Rejected By Server

SMTP Error 550 indicates that the receiving mail server has rejected an email message entirely. This usually occurs due to spam filtering rules, invalid recipient details, or strict mail server policies. Unlike temporary errors, SMTP Error 550 usually requires corrective action before email delivery can be successful. This guide explains how to identify and resolve message rejection issues when using Domains.co.za email services. How to Resolve SMTP Error 550Additional InformationLogin to Domains.co.za Account How to Resolve SMTP Error 550 1. Review the bounce-back message and confirm SMTP Error 550 is listed. 2. Verify that the recipient email address exists and has been spelled correctly. 3. Remove suspicious links, attach […]

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SMTP Error 450 – Mailbox Temporarily Unavailable

SMTP Error 450 occurs when the recipient’s mailbox is temporarily unable to receive email messages. This can happen if the mailbox is locked, undergoing maintenance, or experiencing a temporary server-side issue. This error does not indicate a permanent delivery failure and usually resolves once the mailbox is available again. This guide explains how to handle SMTP Error 450 when sending email from a Domains.co.za email account. How to Resolve SMTP Error 450Additional InformationLogin to Domains.co.za Account How to Resolve SMTP Error 450 1. Review the bounce-back message and confirm SMTP Error 450 is listed. 2. Verify that the recipient email address is correct and active. 3. Wait 30 to 60 minutes before attempting to res […]

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SMTP Error 421 – Temporary Server Unavailable

SMTP Error 421 indicates that the receiving mail server is temporarily unavailable and unable to accept email connections at that moment. This typically happens when a server is overloaded, undergoing maintenance, or intentionally limiting incoming connections to protect itself from abuse or spam. Because this error is temporary by nature, messages are usually retried automatically and delivered once the receiving server is available again. This guide explains how to identify the cause of SMTP Error 421 and what steps to take when it affects email delivery from a Domains.co.za email account. How to Resolve SMTP Error 421Additional InformationLogin to Domains.co.za Account How to Resolve SMTP Error 421 1. Open the bounce-back […]

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SMTP Authentication Failed – Error 535

SMTP Authentication Failed Error 535 occurs when the mail server rejects authentication credentials during the sending process. This means the username, password, or authentication settings provided by the email client or application are incorrect or incomplete. This is one of the most common SMTP errors and is usually caused by misconfigured outgoing mail settings. This guide explains how to resolve SMTP Error 535 when sending email through Domains.co.za servers. How to Resolve SMTP Authentication Failed Error 535Additional InformationLogin to Domains.co.za Account How to Resolve SMTP Authentication Failed Error 535 1. Open the error message and confirm it references SMTP Error 535. 2. Verify that the email account password […]

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How To Change Email Contact For WHM

Learn how to change email contact for WHM (Web Host Manager) which is used for important system notifications, including server alerts, security warnings, update notices, and service-related messages. Updating this email address ensures you receive critical information about your server and hosting environment. This guide explains how to change the contact email address for a WHM account on a Domains.co.za server. Why the WHM Contact Email is ImportantImportant Note Before You Change Email ContactStep 1: Login to WHMStep 2: Update the WHM Contact Email AddressStep 3: Review Notification PreferencesAdditional Configuration OptionsUsing Multiple Contact EmailsAvoid Using Server-Based Email AddressesReseller Account Considerati […]

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How To Configure VPS As A Mail Server

Configure VPS or dedicated server as a mail server allows you to send and receive email directly from your own infrastructure. This provides full control over email delivery, security policies, sending limits, and performance. This type of setup is typically used by businesses that require custom mail configurations, larger outbound email volumes, application-based email sending, or complete ownership of their email environment. Because mail servers are closely monitored by spam filters, blacklist operators, and receiving mail providers, correct configuration is essential. Even minor misconfigurations can result in email delivery failures. This guide outlines the key steps required to configure a VPS or dedicated server as a […]

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How SPF And DomainKeys Improve Email Delivery

SPF and DomainKeys (DKIM) are email authentication technologies that help receiving mail servers verify the legitimacy of messages sent from your domain. These mechanisms reduce the risk of spoofing, phishing, and unauthorised email use. By correctly configuring SPF and DomainKeys, you improve email delivery success and protect your domain’s reputation. This guide explains how these technologies work together and how to ensure they are enabled for your Domains.co.za domain. How SPF And DomainKeys Improve Email DeliveryAdditional InformationLogin to Domains.co.za Account How SPF And DomainKeys Improve Email Delivery SPF (Sender Policy Framework) and DomainKeys (DKIM) are email authentication technologies that help receiving […]

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How To Change A IMAP Email Account To POP3

This guide explains how to change a IMAP email account to POP3 using your Domains.co.za email settings. Email accounts can be configured using either IMAP or POP3, depending on how you prefer your messages to be stored and accessed. IMAP keeps your emails stored on the mail server and synchronised across multiple devices, while POP3 downloads emails to a single device and usually removes them from the server. If you prefer local email storage, wish to reduce server mailbox usage, or primarily access your email from one device, switching from IMAP to POP3 may be the better option. IMPORTANT: Email applications do not allow an IMAP account to be converted directly to POP3. To make this change, you must remove the IMAP account […]

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How To Add IP Address To SPF Records In cPanel

This guide explains how to add IP Address to SPF record safely using cPanel. SPF (Sender Policy Framework) is an important email authentication method that helps protect your domain from spam, spoofing, and unauthorised email use. By specifying which mail servers and IP addresses are allowed to send email on behalf of your domain, SPF improves email delivery and helps maintain your domain’s reputation. If you use third-party email services, custom mail servers, or external applications to send email using your domain, you may need to add their IP addresses manually to your SPF record. How to Add an IP Address to SPF RecordEditing the SPF Record to Add an IP AddressDNS Propagation TimeAdditional InformationUnderstanding SPF […]

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How To Change A POP3 Email Account To IMAP

In this guide, we explain how to change a POP3 email account to IMAP using your Domains.co.za email settings. Email accounts can be configured using either POP3 or IMAP, depending on how you want your emails stored and accessed. POP3 downloads messages to a single device and does not keep them synchronised, while IMAP stores emails on the mail server and keeps them in sync across all connected devices. If you access your email from multiple devices, require consistent folder synchronisation, or want your messages securely stored on the server, switching from POP3 to IMAP is recommended. IMPORTANT: Email applications do not allow an existing POP3 account to be directly converted to IMAP. To change protocols, you must remove t […]

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