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Barracuda Email Security Gateway

How can I send outgoing mail through my Barracuda Spam Firewall using my iPhone?

  • Type: Knowledgebase
  • Date changed: 3 years ago
Solution #00003338

Scope:
All Barracuda Spam Firewalls in use with one or more iPhones, all firmware versions.

Answer:
In order to enable mobile devices like the iPhone to send mail out through the Barracuda Spam Firewall, you'll need an authentication server. Once that's been configured, you'll need to configure the Barracuda Spam Firewall to use it when authenticating outgoing mail from external devices.

-=Firmware version 4 and below
In order to enable mobile devices like the iPhone to send mail out through the Barracuda Spam Firewall, you'll need an authentication server. Once that's been configured, you'll need to configure the Barracuda Spam Firewall to use it when authenticating outgoing mail from external devices. To enable Outbound / Relay authentication on the Barracuda Spam Firewall, navigate to the Advanced > Outbound/Relay page, select the authentication server type (SMTP or LDAP), and configure the necessary options.

-=Firmware version 5+
In order to enable mobile devices like the iPhone to send mail out through the Barracuda Spam Firewall, you'll need an authentication server. Once that's been configured, you'll need to configure the Barracuda Spam Firewall to use it when authenticating outgoing mail from external devices. To enable Outbound / Relay authentication on the Barracuda Spam Firewall, navigate to the Basic > Outbound page, select the authentication server type (SMTP or LDAP), and configure the necessary options.

 
It's also important to make sure the traffic between the mobile device and the Barracuda Spam Firewall is not interrupted, so if you are using a Cisco Firewall, disable the SMTP fixup protocol (or enable the NO INSPECT ESMTP option) there. Then, go to the Advanced > SMTP/TLS page and enable TLS over SMTP (which the iPhone uses when communicating over SMTP). Lastly, you will need to change the outgoing SMTP port on the iPhone to 25 (by default, it might be set to 587), or forward incoming firewall connections on port 587 to the Barracuda Spam Firewall on port 25.

After making these changes, the iPhone should be able to relay outgoing messages through the Barracuda Spam Firewall (as long as it is able to authenticate with the authentication server).

Additional Notes:

When configuring a mail account on your iPhone, after setting up the authentication on the Barracuda Spam Firewall as above, you may need to explicitly specify the authentication method as Password. You can find this option on the iPhone under Advanced for that particular email account. Then, of course, you'll need to enter your password for that account into your iPhone.



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https://campus.barracuda.com/solution/50160000000HAJrAAO