SMTP Service

Overview

The SMTP service is readily available in the service zone and is automatically billed based on usage. It enables sending notifications from your applications hosted at Cloud Avenue, particularly to your technical services.

Features

• Emails are scanned, and those containing viruses are rejected.
• Emails are authenticated using multiple mechanisms:
  • DKIM and DMARC for the protection of the sender domain (cloudavenue.orange-business.com).
  • SPF for the protection of the public IPs of SMTP servers.
• TLS is configured in opportunistic mode, encrypting communications between you and the SMTP server if both demanded and supported by your system.

Limitations

• SMTP servers only accept messages from VMs hosted at Cloud Avenue.
• The sender address must be smtp-service@cloudavenue.orange-business.com.
• The maximum allowed message size is 15MB.
• The maximum number of simultaneous connections per client is 10.
• The maximum number of connections per minute from a client is 60.
• The maximum number of emails sent within a 24-hour period is 2000.

Billing

Accessible via NAT (Network Address Translation), the service is billed per NAT IP and based on automatically recorded usage according to the following tiers:

Exceeding a tier in a single day of the month will switch that month’s consumption to the corresponding rate. Note that multiple VMs can use the same NAT IP and thus group their emails employing the same tallies, thus sharing it. Conversely, multiple NAT IPs can be used to benefit from multiple tallies.

Service Usage

Using the service requires prior configuration of NAT access to the service zone. Your mail software/client must then be configured as follows:

• SMTP server name (requires the use of Cloud Avenue DNS): smtp.service.cav
• SMTP server IP address: 57.199.209.206
• Port to use: 25
• Sender address: smtp-service@cloudavenue.orange-business.com
• Recipient address: any valid email address that should receive the message
• The subject of the email must not be empty.
• The body of the email must not be empty.

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