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Add note about port 25 being blocked by cloud platforms #428

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2 changes: 2 additions & 0 deletions docs/self-hosting-configuration.md
Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,8 @@ Plausible uses a SMTP server to send transactional emails e.g. account activatio
| SMTP_HOST_SSL_ENABLED | false | If SSL is enabled for SMTP connection |
| SMTP_RETRIES | 2 | Number of retries to make until mailer gives up. |

Note that cloud platforms, like AWS or GCP, block all outbound traffic to port 25. You will have to use an external provider in this case.

Alternatively, you can use other [Bamboo Adapters](https://hexdocs.pm/bamboo/readme.html#available-adapters) such as Postmark, Mailgun, Mandrill or Send Grid to send transactional emails. In this case, use the following parameters:

| Parameter | Default | Description |
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