# 在服务器阻止出站端口25/465/587的情况下如何发送电子邮件

**URL:** <https://meta.discourse.org/t/how-to-send-emails-on-server-with-25-465-587-outbound-blocked/86309>\
**Category:** Product Support\
**Created:** [2018 年4 月 27 日 14:56 UTC](https://meta.discourse.org/t/how-to-send-emails-on-server-with-25-465-587-outbound-blocked/86309 "2018-04-27T14:56:57Z")\
**Posts on this page:** 1\
**Showing post:** 8

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作者： ![itsbhanusharma](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/itsbhanusharma/32/180717_2.png) [@itsbhanusharma](https://meta.discourse.org/u/itsbhanusharma)\
发布日期： [2018 年4 月 28 日 05:35 UTC](https://meta.discourse.org/t/how-to-send-emails-on-server-with-25-465-587-outbound-blocked/86309/8 "2018-04-28T05:35:22Z")

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> [@Vencent](#):
>
> Though it is not officially documented by Mailgun

I bet it is indeed documented here:

> **[Where can I find my API keys and SMTP credentials?](https://help.mailgun.com/hc/en-us/articles/203380100-Where-can-I-find-my-API-keys-and-SMTP-credentials)**
>
> Overview
> Authentication is required any time you wish to relay messages through our platform. When using our API, you need to use one of your account's API keys (either an Account API Key or a Doma...

This Page clearly states:

> Google Compute Engine allows port 2525 for SMTP submission.

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