Hello Thunderbird Support Team, I’m the founder of Jobgap, and we use Thunderbird to manage dedicated alias email accounts for our users under our registered domain orbitalpost.com. These emails act as bridges for job applications, and it’s critical for our global team to access them reliably. Here’s the issue we’re facing: I (based in London, UK) can configure and use our Orbitalpost email accounts in Thunderbird without any issues. Auto-detection works and manual configuration (IMAP/SMTP) also connects fine. However, my staff based in Nigeria and India consistently encounter errors when attempting to configure the exact same accounts in Thunderbird. The most common error is: “Thunderbird failed to find the settings for your email account.” They’ve tried both auto-detection and manual setup, but Thunderbird either fails to detect settings or won’t connect. Technical details: Domain: orbitalpost.com IMAP server: imap.orbitalpost.com, Port 993, SSL/TLS SMTP server: smtp.orbitalpost.com, Port 465 (SSL/TLS) or 587 (STARTTLS) Authentication: Normal password Username: full email address What we’ve observed: Accounts work perfectly in London but not in Nigeria/India. This makes me suspect either a Thunderbird autoconfig issue, DNS resolution issue across regions, or ISP-related SMTP port blocking. Questions for Thunderbird Support: Is there a way to create a Thunderbird autoconfig file (autoconfig.xml) for orbitalpost.com so all staff accounts auto-detect settings, regardless of location? Could Thunderbird be failing due to DNS lookups that resolve differently in different regions? What’s the recommended best practice for ensuring Thunderbird works reliably for distributed teams using custom domains like ours? I’d appreciate any guidance or documentation you can provide — we need to ensure Thunderbird works consistently across regions, as it’s core to our operations. Thank you, Leke Ayodele Founder, Jobgap London, UK