Troubleshoot and Fix Debian Mailing System
Summary
Freelancer Client is hiring: Troubleshoot and Fix Debian Mailing System.
Location: Remote
For the last decade a Debian machine on our vessel has been flawlessly running a set of Perl scripts that squash outgoing mail, hand it to an Iridium modem and deliver it to my shore-side mail server. Incoming messages follow the reverse path. Suddenly nothing moves in either direction.
The Iridium link itself passes its own internal tests.
DNS on the ship resolves the server name correctly.
Both the shipboard PC and the land-based server have been rebooted.
No recent configuration changes were made.
Skills: PHP, Perl, Linux, Troubleshooting, Ubuntu, Debian, SMTP, System Administration
Budget: $12–$18 USD
Source: Freelancer Client via Remote / Online. Apply on the source website.
Original
For the last decade a Debian machine on our vessel has been flawlessly running a set of Perl scripts that squash outgoing mail, hand it to an Iridium modem and deliver it to my shore-side mail server. Incoming messages follow the reverse path. Suddenly nothing moves in either direction.
Here is what I already know and have ruled out:
• The Iridium link itself passes its own internal tests.
• DNS on the ship resolves the server name correctly.
• Both the shipboard PC and the land-based server have been rebooted.
• No recent configuration changes were made.
• A Kerio Connect firewall sits in front of the mail server.
Given that, I suspect the mail server is at fault, but I am not yet sure whether it still exchanges mail with any source other than the ship. I therefore need a seasoned mail-flow troubleshooter who is comfortable with Linux, Kerio Connect, SMTP diagnostics, log analysis and, if necessary, Perl-based hand-offs.
Deliverables I need from you:
1. Remote investigation (log review, test messages, flow tracing) to pinpoint the exact break in the chain—mail server, firewall rule, SMTP auth, queue corruption, etc.
2. Concrete fix implemented or clear instructions I can apply immediately to restore full bidirectional email between ship and shore.
3. A brief report summarising root cause and the steps taken so we can avoid a repeat.
Once mail is flowing again and confirmed from both ends, the job is done.
Location & Details
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