Unable to set-up SMTP server : Error 500 no route to host

[henri_espo]

Hello,
I'have installed EspoCRM for two different NGO I'm working for. This is really a great product, thanks to all contributors !
Unfortnately on both installations (different hosting - gandi.net; ovh.com) I got the same issue when trying to setup SMTP parameters : no route to host.
Of course, I tried with several SMTP server and even to provide IP address instead of server name.

Both installation are on shared hosting.
Thanks for help.
Regards.

[tanya]

Hello
This error is not related with EspoCRM. One of possible reason could be server hosted on a dynamic ip address

https://www.howtoforge.com/community/threads/sendmail-error-no-route-to-host.12107/

Other one - firewall.
Or When connecting from different network google mail server won't let your web app to connect.

https://stackoverflow.com/questions/22473471/phpmail-gmail-no-route-to-host-65-smtp-connect-failed

No idea, why you get this error