php - Unable to connect to SMTP server - Stack Overflow

May 06, 2020 Error: 'Cannot connect to SMTP server' - Kerio Connect [14/Jul/2019 14:50:43] Cannot connect to SMTP server . Messages will stay in the message queue. In such a situation, Message Queue in Kerio Connect Webadmin is full of emails with status 4.4.1 Cannot connect to host. Send email from a printer, scanner, or app - G Suite Admin

Apr 15, 2020

Can't connect Outlook to Google IMAP Server - Gmail Community Same thing happened to me, and about the same timing. I've created app-specific passwords at least 4 times so far, trying to get it all back up and running. I did find that they work on the SMTP server if I try to send an email, but the IMAP connection to the incoming server … System Log Information

Open a connection from your computer to an SMTP mail server. $ telnet smtp.domain.ext 25 220 …

Open a connection from your computer to an SMTP mail server. $ telnet smtp.domain.ext 25 220 … Why Outlook Can't Access the SMTP Server | Your Business