Emails are not sent from a Plesk server with the errors "25: Connection timed out" and "25: Network is unreachable"

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    Daniel Pereyra

    This solved my issue of emails getting stuck on queue. 

    I'm using DigitalOcean as cloud provider and the Plesk package (https://marketplace.digitalocean.com/apps/plesk), as default on Tools and Settings > Mail Server Settings > Outgoing mail mode, was set to "Send from domain IP addresses".

    I think in my case, as the domains are using a floating IP, the server stop sending emails. I have set the Outgoing mail mode to the droplet IP address and now is working. I have also discovered that I had other messages in queue from the date I have changed to floating IP use.

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    Bulat Tsydenov

    Daniel Pereyra, thank you for sharing your experience, some other Plesk users may find it helpful!

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