SMTP transfer denied with error message
550 relaying deniedis displayed to the user.
In certain circumstances, the error message can occur when attempting to send or receive mail via F-Secure Internet Gatekeeper for Linux (FSIGK).
SMTP transfer denied is a common issue mainly because e-mail recipient domains are restricted on the server concerned. For the most part, this is a consequence of the huge quantities of spam flooding e-mail networks.
Note: This article assumes deep technical understanding of F-Secure's products, network protocols and the relevant operating system. If you are unsure, contact F-Secure support for assistance.
To ensure e-mail delivery, do as follows:
- If you receive e-mail messages from the Internet to specific domains, on the SMTP proxy page, specify the domains in Restrict e-mail recipients.
- If you send e-mail messages from internal machines and transfer from specific clients is needed, specify the connecting client as Hosts and networks within LAN and enable the LAN access settings section.
Note: If connecting addresses are translated by NAT, the address connecting to FSIGK must be specified. The connecting address can be seen in the access.log file.
- LAN access settings > on.
- Hosts and Networks should contain
For more information, see F-Secure Internet Gatekeeper - Administrator's Guide.