Mail Sending Rules and Guidelines

• Mweb uses sending rules to protect our servers, prevent blacklisting and keep email delivery reliable.

  Why We Have Sending Rules

  • Incoming spam can slow down servers and clutter inboxes.

  • Outgoing spam (intentional or malware-generated) can harm reputation and cause blacklisting.

  • Rules keep the service stable and dependable.

  Sending Rules

  • Recipients per message: up to 25

  • Messages per hour: about 400

  • Maximum message size: 35 MB (including attachments)

  If you reach the sending rules, split the send into smaller batches or reduce attachments.

  Authenticated Sending

  Send using:

  • Outgoing server: smtpauth.mweb.co.za

  • Port: 587

  • Authentication: Required (your full email address and password)

  • Encryption: Enabled

  Connecting to Other Servers

  Outbound port 25 is blocked on the Mweb network. If you connect to another provider’s mail server, use port 587 (or another supported port).

  Connecting From Other Networks

  You can still send and receive when connected through another provider using the settings above. If their network blocks port 587, use that network’s outbound mail server.

  Spam Prevention

  Protection systems are adaptive and may occasionally pause high-volume sending to protect overall reliability.

• Avoid large promotional bulk sends through Mweb Mail.

  Keep each message under 35 MB.

  If you see a temporary pause or warning, wait and resend in smaller batches.