Knowledge base
What happens to e-mail when the server is down: is it returned to the sender or lost?

Mail Transfer Agents (MTA) on the internet will continue trying to deliver e-mail to your domain if your server is down. Some MTAs will notify the sender if they’re not able to deliver an e-mail within an hour, however they will continue to retry the delivery. How long an MTA tries is configurable but most will try anywhere from 3 to 7 days. If after that time, the e-mail is still undeliverable the MTA will give up and notify the sender of the failure.
Categories
Getting started:
Cpanel control panel:
- How do I access my control panel?
- How do I access the Fantastico auto-installer?
- Awstats: Error: LogFile parameter
- Access your Cpanel before your domain has propagated
- Cron jobs: what are they, and how to use them
Webhost manager (WHM):
- Do not change the username or domain name for any of your domains
- Always let WHM finish the current process
- Do not use hyphens or underscores in usernames
- Access all accounts with the WHM password
- Setting strong passwords
Questions and tips:
E-mail:
- Blocking all mail to an e-mail address
- What are the SMTP and POP server addresses?
- Mailing lists: limits of usage
- What happens to e-mail when the server is down: is it returned to the sender or lost?
- How do I access webmail for my account?
Domains and DNS:
FTP and files:
- What are the FTP timeout settings?
- The public_html and www directories
- What is the maximum number of FTP connections per user?
- What is the max number of files/directories I can display in FTP?
- File permissions explained
Htaccess magic:
CGI, PHP and Perl:
- What is the path to..?
- Formmail: important notes
- ImageMagick
- SuExec: what it is and how it affects your scripts