Email Hosting - What is SMTP?
SMTP (Simple Mail Transfer Protocol) is TCP/IP Protocol used for sending and receiving e-mail. However, since it is limited in its ability to queue messages at the receiving end, it is usually used with one of two other protocols, POP3 or IMAP, that let the user save messages in a server mailbox and download them periodically from the server. In other words, users typically use a program that uses SMTP for sending e-mail and either POP3 or IMAP for receiving e-mail.
How to resolve SMTP issues?
Incorrect username or password
You may get a popup saying "Enter network password" if you use Outlook.
- Use your full email address for your username - it should look like firstname.lastname@example.org.
- Test your username and password in webmail at http://webmail.example.com. Replace example.com with your own domain.
- Reset your email password for assistance.
- In Apple Mail especially, try re-typing your username and password, even if they are correct. Sometimes the stored password keychain gets corrupted.
Mailbox full / Quota Exceeded / Could not create output file
- This error indicates that the recipient's mailbox is full. You should receive the same error if you try to send to that particular recipient from a various email address. Please let them also know about this problem.
- It is also possible to receive a disk space error if you store a copy of sent messages on the server for that mailbox, and the mailbox may nearing its capacity.
Rejected: User does not exist / No such address
This error indicates that recipient address may be misspelled, or may recently have been deleted as a mailbox on the recipient side. If your recipient has recently changed their DNS or their mail provider, you may need to wait 24-48 hours for their address to be switched to new server.
Incorrect SMTP Configuration Files
Make sure your SMTP configuration files are present or not and configured correctly.
You can also rebuild your mail configuration files with the following command:
Run the following command in SSH:
ls -l /etc/xinetd.d/smtp*
You should see the following results:
-rw-r--r-- 1 root root 416 Sep 2 15:20 /etc/xinetd.d/smtp_psa
-rw-r--r-- 1 root root 417 Sep 2 15:20 /etc/xinetd.d/smtps_psa
The names should have underscores, and the permissions and ownership should match those shown above.
If underscores are missing, you can restart the mail service with the blow command:
/usr/local/psa/admin/bin/mailmng -o ; /usr/local/psa/admin/bin/mailmng -p ; /etc/init.d/xinetd restart ; /etc/init.d/qmail restartWhy this ijsidkjslsjdWhy this issue happens ?Why this issue happens ?