Cann't send to gmail

[nhcka]

I setup mail server on google cloud using VM Instance.
I can receive mail from gmail, but can not send to it.

Error:

Diagnostic-Code: X-Postfix; connect to
alt4.gmail-smtp-in.l.google.com[173.194.209.26]:25: Operation timed out

Because Google blocks outgoing port 25. How do I change to port 587 to send mail?

[jeboehm]

Hi,
most services won't accept incoming mails on port 587.
Please have a look on https://cloud.google.com/compute/docs/tutorials/sending-mail

[kiko0217]

hi, can explain clearly?, i get same problem.

[TopTuK]

Hi colleagues! I have same issue: can't send via 25 port. Plz advise me what to do?