is there any guide how to setup google workspace (gmail) hybrid with mailcow like this exchange guide?

docs.mailcow.email Icon Exchange Hybrid Setup - mailcow: dockerized documentation

docs.mailcow.email Icon docs.mailcow.email
Exchange Hybrid Setup - mailcow: dockerized documentation
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docs.mailcow.email

  • This works for me.
    please edit Options > Forwarding Hosts > Add: ???

    DNS
    MX: ASPMX.L.GOOGLE.COM 1
    MX: ALT1.ASPMX.L.GOOGLE.COM 5
    MX: ALT2.ASPMX.L.GOOGLE.COM 5
    MX: ALT3.ASPMX.L.GOOGLE.COM 10
    MX: ALT4.ASPMX.L.GOOGLE.COM 10
    SPF: include:_spf.google.com

    Google Workspace Admin Console [https://admin.google.com/u/0/ac/home?hl=en]
    Apps > Google Workspace >
    Gmail >
    Hosts > Add route
    Name: From Gmail To Mailcow
    Single host: mail.example.com:587
    Perform MX lookup on host: (ckecked)
    Routing >
    Routing >
    Name: From Gmail To Mailcow
    Inbound, Internal - Receiving
    Route Change route
    Also reroute spam
    From Gmail To Mailcow
    Show options
    Account types to affect : Unrecognized / Catch-all
    Only affect specific envelope recipients > Pattern match : example.com
    SMTP relay service >
    Only addresses in my domain
    Only accept mail from the specified IP addresses [mailcow server IP addresses]
    Require SMTP authentication [do not check; it requires Gmail account]

    mailcow [https://mail.example.com]
    System > Configuration >
    Options > Forwarding Hosts > Add: ???
    Routing > Add sender-dependent transports
    Host: smtp-relay.gmail.com:587
    User: (leave it empty)
    Pass: (leave it empty)
    Email > Configuration > Domains > example.com
    Sender-dependent transports: smtp-relay.gmail.com:587
    Relay non-existing mailboxes only [checked]

This works for me.
please edit Options > Forwarding Hosts > Add: ???

DNS
MX: ASPMX.L.GOOGLE.COM 1
MX: ALT1.ASPMX.L.GOOGLE.COM 5
MX: ALT2.ASPMX.L.GOOGLE.COM 5
MX: ALT3.ASPMX.L.GOOGLE.COM 10
MX: ALT4.ASPMX.L.GOOGLE.COM 10
SPF: include:_spf.google.com

Google Workspace Admin Console [ https://admin.google.com/u/0/ac/home?hl=en

admin.google.com
https://admin.google.com/u/0/ac/home?hl=en
No preview could be generated for this link
]
Apps > Google Workspace >
Gmail >
Hosts > Add route
Name: From Gmail To Mailcow
Single host: mail.example.com:587
Perform MX lookup on host: (ckecked)
Routing >
Routing >
Name: From Gmail To Mailcow
Inbound, Internal - Receiving
Route Change route
Also reroute spam
From Gmail To Mailcow
Show options
Account types to affect : Unrecognized / Catch-all
Only affect specific envelope recipients > Pattern match : example.com
SMTP relay service >
Only addresses in my domain
Only accept mail from the specified IP addresses [mailcow server IP addresses]
Require SMTP authentication [do not check; it requires Gmail account]

mailcow [https://mail.example.com]
System > Configuration >
Options > Forwarding Hosts > Add: ???
Routing > Add sender-dependent transports
Host: smtp-relay.gmail.com:587
User: (leave it empty)
Pass: (leave it empty)
Email > Configuration > Domains > example.com
Sender-dependent transports: smtp-relay.gmail.com:587
Relay non-existing mailboxes only [checked]

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5 days later

Hi guys, i try to configure a server with google smtp relay , to send and receive mails on mailcow. I am able to send not to receive. The configuration is a bit odd. The server FQDN and implicitly the mx for mail is not a google workspace domain, is an outside domain, but the domain added to be used for emails is. Can someone help me solve the issue, please ? I am getting Your message wasn’t delivered to test@unfairedge.net because the domain unfairedge.net couldn’t be found. Check for typos or unnecessary spaces and try again.

550 5.7.1 Invalid credentials for relay [2a00:1450:4864:20::22e]. The IP address you’ve registered in your Workspace SMTP Relay service doesn’t match the domain of the account this email is being sent from. If you are trying to relay mail from a domain that isn’t registered under your Workspace account or has empty envelope-from, you must configure your mail server either to use SMTP AUTH to identify the sending domain or to present one of your domain names in the HELO or EHLO command. For more information, please visit SMTP relay service error messages - Google Workspace Admin Help

support.google.com
SMTP relay service error messages - Google Workspace Admin Help
Mail relay denied Email is being sent from a domain or IP that isn’t registered in Google Workspace. Please sign in to your Google Workspace account and verify that your sending device IP is r
support.google.com
dv16-20020a170906b81000b009dd4820c4dasm1466977ejb.213 - gsmtp

error message. Mailcow server is installed on contabo, and i use Cloudflare for DNS management for both domains.

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