What Happens If My SMTP Server Is Down?
Email is transmitted through email routing servers called Simple Mail Transfer Protocol (SMTP) servers. If the forwarding server is not responding, it is usually queued for a subsequent delivery attempt. If it can’t be delivered, it is finally returned to the sender with an error message. If your SMTP servers are having trouble with downtime, Chargebee will keep them on hold and try the email triggers again after a while.
In addition to forwarding SMTP e-mail messages, the server also checks whether an active or working email account is sending the outgoing message. If the email cannot be delivered, it is ensured that the email is returned to the sender. This action is intended to tell the sender that they have the wrong email address, or the receiving server is blocking emails from the sender ID. Many companies, whether small or large, choose to set up internal web servers that are intended for use by employees.
SMTP servers allow employees to synchronize email client software on their workstations with their mailboxes on the server. This can be a major advantage for the privacy and security of the company. However, before you allow users to access the server, you should verify that the server is actually running and accepting connections. This can be achieved on all operating systems using web-based tools or Telnet software, or by using internal commands from command line terminals.
The only server you’d have to worry about would be the first server you connect to to to send the message. If you want to find the address of the SMTP server you’re currently using, you can easily find it in your email client settings. Learn everything about an SMTP server for outgoing email to better understand the email delivery chain of command.