Why can't I send mail over port 25?

Whether port 25 is available depends on the product: some products have port 25 open, while others block it due to anti-spam policy or upstream data center restrictions.

On products that block port 25, it cannot be opened for an individual machine, and submitting a ticket will not lift the block.

If your product blocks port 25 and you need to send email, please use a third-party email provider's SMTP service (usually on port 465 or 587).

If you plan to run your own mail server, confirm before purchasing whether the product you choose has port 25 open.

The port 25 block is not a reason for a refund. For refund eligibility, see the VPS refund policy.