Is it possible to change email@example.com to firstname.lastname@example.org?
Disclaimer: Before you setup your SMSEagle device to accept FQDN email addresses, be aware, that a weak point of such configuration will be your DNS server. Once DNS server becomes unavailable (it breaks or connection to it will break) your Email2SMS messages will not be sent. This is additional risk point in terms of sustainability of your configuration.
If you accept abovementioned disclaimer, here are the steps for settting-up your SMSEagle to accept FQDN addresses:
1. Configure domain yourdomain.com
on your DNS server to point to SMSEagle device (A, MX entries).
2. Login to your SMSEagle device with SSH
3. Edit file:
[for NXS device type:]
[for MHD device type:]
[for NPE device type:]
a) find line: myhostname = localhost.localdomain
b) comment the line (add a # sign before it):
#myhostname = localhost.localdomain
c) add new line: myhostname = yourdomain.com
d) save file, exit from editor
4. Reload Postfix configuration with command