POP3 connect error.

Copper Contributor

Exchange 2019 standalone new installation. POP3 allowed, POP3-service running, mailbox created. Mailbox is accessible by OWA. When I try to connect manually to the POP3 server I got an error:
+OK The Microsoft Exchange POP3 service is ready.
PASS MYPassWord826
-ERR Server Unavailable. 21


1 Reply

Hi @Livitin_Serg , have a look at this.