Can not start mail function

[MGroote]

I searched the web and this forum but can not find the solution

I have 2 Joomla 3.8.13 sites hosted at one.com and noticed that sending e-mail isn’t working.
When I push the test mail in the Global settings with PHP mail this error message comes up “can not start e-mail function” “test mail could not be sent”.

When sendmail is selected also aan error “can not execute /usr/sbin/sendmail” followed by “test mail could not be sent”.

SMTP settings gives the following error
“An error has occurred while fetching the JSON data: HTTP 503 status code. error“

I contacted one.com but they say all systems are green and e-mail should work.
What is wrong with my Joomla setup?

[Rondeb]

Hallo,

ik antwoord in Nederlands omdat dit ook "Dutch Section" is

Je hebt het probleem op 2 sites ga na op beide sites wel extensies (component, plugins, modules) gelijk zijn aan beide sites.

Schakel dan 1 voor 1 de extensies en test of mail functie wel werkt.

Zo kun je achterhalen of een van de extensies de boosdoener is.

Lees ook dit topic viewtopic.php?t=937387

Succes ermee.

groeten Ron