Configured a mail service on server alpha; it connects from beta but times out from alpha. Test command yields:
$ netcat mailservice.com 587
Is alpha’s IP blocked?
I encountered a similar problem while working with Mailgun. In my experience, the issue wasn’t necessarily that Mailgun actively blocks certain IPs but that they may flag unusual activity or configuration issues. When my server faced intermittent connectivity, I discovered that it was primarily due to misconfigured reverse DNS and improper SPF details. After correcting the DNS settings and confirming no suspicious email patterns on my server, the connectivity problem was resolved. It might be worthwhile to review your server’s configuration and Mailgun’s documentation for any potential adjustments.
After investigating a similar timeout issue on my end, I found that the connectivity problem was more commonly associated with configuration or network routing issues rather than an outright IP block by Mailgun. In my case, detailed checks on DNS settings, including both forward and reverse lookups, along with ensuring proper SPF and DKIM configurations, identified a misrouting issue that caused delays and timeouts. It is advisable to double-check your alpha server network settings and firewall rules to ensure they match Mailgun’s guidelines, and conduct verbose logging to better isolate the problem.
hey, i had a similar sitch. not mailgun blockin ip though, it’s often a network config issue, like firewall messups. double-check alpha settings for misconfig errors, it saved me after a few head-scratchers.
Based on my experience, the issue you’re encountering is likely due to local network settings rather than Mailgun actively blocking your server’s IP. I had a similar problem where my server’s connection was failing until I re-examined its network configuration. I discovered that improper settings in our firewall and slight misconfigurations in DNS resolution were causing the delays. By carefully auditing the server’s routing rules and verifying that all reverse DNS entries were correct, the problem was resolved. I suggest checking the overall infrastructure settings in addition to Mailgun’s recommendations.