Knowledge Base

Email server limits - Windows Hosting

How to redirect URL without WWW to URL with WWW using .htaccess

How to redirect HTTP to HTTPS using .htaccess

How to use .htaccess and .htpasswd configuration files

How to display errors in PHP application

How to set up an email client

How to send a simple email message [VB.NET]

How to send a simple email message [C#]

550 5.7.1 We do not relay, account limits apply

554 5.7.1 Message cannot be accepted, spam rejection

554 5.7.1 Message cannot be accepted, spam filter rejection

554 5.7.1 Message cannot be accepted, filter rejection

554 5.7.1 Message cannot be accepted, content filter rejection

554 5.3.4 Message size exceeds fixed maximum message size

554 5.3.1 Maximum message size exceeded

554 5.2.2 Maximum mailbox size exceeded

552 5.5.3 Too many recipients

551 5.1.1 No such user found

551 5.1.1 No such mailing list found

550 5.7.1 You have rights to send mail to local domains only

550 5.7.1 We do not relay

550 5.7.1 Permission denied

550 5.7.1 Access to not allowed by rules

550 5.7.1 Access not allowed

550 5.1.1 Unknown user; rejecting

550 5.1.1 Unknown local user

530 5.7.1 Authentication required - AUTH

504 5.7.6 Unrecognized authentication type

503 5.5.1 Incorrect command sequence

503 5.5.1 HELO/EHLO command required

503 5.5.1 HELO/EHLO already specified

503 5.5.1 Authentication already done

502 5.5.1 Sorry, we do not support this operation

501 5.7.1 Permission denied

501 5.7.0 Authentication failed

501 5.5.4 Syntax error in parameters scanning

501 5.5.2 Unbalanced

501 5.5.2 Domain name required

501 5.5.1 HELO/EHLO requires domain address

501 5.0.0 Authentication canceled

500 5.5.1 Command unrecognized