Using Sendgrid to send out emails

maybl8

I want to use sendgrid to send out emails.
I have setup sendgrid to send out emails.
I have tested it and it passed.
However when I send from mailcow to say xxxx@gmail.com the postfix log seems to show it connecting to gmail with port 25 instead to sending the mail to sendgrid so it can send the email out.

Let me know what info is needed to troubleshoot this.
I can receive emails but can’t send.

D4niel

Did you follow the instructions? https://docs.mailcow.email/manual-guides/Postfix/u_e-postfix-relayhost

maybl8

I didn’t read that.
After reading it I fixed it.
It was the setting in the domain section for using the sender dependent transport.
Thanks

bkalai

what is the sandgris host name/ip

esackbauer

bkalai what is the sandgris host name/ip

you get this from sendgrid.

bkalai

Thanks
I followed https://docs.mailcow.email/manual-guides/Postfix/u_e-postfix-relayhost
I added the hostname and the api key to the routing tab in mailcow configuration. tested with a user that is NOT register with sendgrid and got success. also edit the email domain/Sender-dependent transports and selected smtp.sendgrid from the drop down list
Now I tried to send an email from SOGo but got
Undelivered Mail Returned to Sender
barakkalai1@gmail.com: host smtp.sendgrid.net[52.204.68.213] said: 550 The
from address does not match a verified Sender Identity. Mail cannot be sent
until this error is resolved

I didn’t get the same error when sent from outlook

yugonito

bkalai

I’m in the same situation.
All working everywhere except with SoGO.
Have you an idea to fix the seding issue on secondary domains with SOgo ?

i’ve using other webmail like snappymail, and is working fine.
But i want to understand why with SOgo, secondary domains not working with sendgrid sender authentifiation.

Thanks

bkalai

do I need to open port25 if I have a smtp relay from sendgrid?

esackbauer

No, that is the whole point in having a sendgrid relay. I guess it uses port 587. Check with their documentation.
Sendgrid does have nothing to do with your incoming mails!

bkalai

Thanks for the response. thanks for confirming. they use 587 and 465
Thanks for all the help