Email forward with relay mail for specific domain

[riba]

SYSTEM INFORMATION
OS type and version	Ubuntu 20
Virtualmin version	Latest

Hi! I just set up smtp relaying for specific domains so when I send mail from domain client1.com it will send it via SendGrid and this works perfect. I also have setup mail forward for this domain from info@client1.com to client1@gmail.com. Here comes the problem:

<client1@gmail.com> (expanded from <info@client1.com>): host
gmail-smtp-in.l.google.com[173.194.79.27] said: 550-5.7.26 This message
does not have authentication information or fails to 550-5.7.26 pass
authentication checks. To best protect our users from spam, the 550-5.7.26
message has been blocked. Please visit 550-5.7.26

How can I achieve that email forwarded for this domain (client1.com) will be also relayed with SendGrid?

[dimitrist]

if we could see message headers we could probably understand why evil corp blocked it…

anyway, email forwards are a bad idea these (SPF/DMARC) days… better solution imho, use gmail as email client. evil corp has some instructions on that… : Add another email account to the Gmail app - Android - Gmail Help

2c.

[riba]

Hi! The problem is email forward does not use relay specified for this domain but it is sent (forwarded) by my server. When I send email from domain client1.com with any client (Outlook, Thunderbird, Webmail) it will go through SendGrid and I will see if email was received, bounced, rejected, opened etc… but when I send to let say info@client1.com which is forwarded to gmail it will not use SendGrid… is there a way to set email forwarding to use specific relay? There is nothing useful in message header… Thanks!