Cannot send email from a computer that is not on the same domain as the e-mail server

We have just set up a mail server on Amazon. I can send email from the fine command line. I can send and receive e-mail from a PC connected to the Amazon with Thunderbird field. I can receive e-mail from a PC outside the realm of server (Amazon) with Thunderbird mail, but cannot send mail. I always get an error in time-out to a PC outside the field of Amazon. The SMTP settings are identical between computers connected to different areas. All necessary ports are also open. Any help would be greatly appreciated.

It was a problem of incoming firewall after all. Problem solved.

Tags: Thunderbird

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