Common mailer-daemon messages

The common mailer daemon messages are explained below.

250 Requested mail action okay completed
552 Mailbox full
552 Message exceeds maximum fixed size
550 “username” Is Not Accepting Mail From This Sender
550 Mailbox Not Found
550 Access denied
550 Sender domain not found in DNS
550 Requested action not taken: DNS FAILURE
550 Service unavailable or SMTP error from remote mailer after initial connection
452 Requested action not taken
500 Syntax error, command unrecognized
Unknown Host
Unknown User
Service Unavailable
Unbalanced
Cannot Send for XX Days
Unrecoverable Error

250 Requested mail action okay completed

This is not an error. This indicates that your email has been accepted

552 Mailbox full

This error indicates that the AOL member's mailbox is full. The AOL member will need to free up additional space before he/she can receive e-mail.

552 Message exceeds maximum fixed size

This indicates that the mail sent was larger than the maximum size that AOL currently allows. The largest piece of e-mail that an AOL member can accept from or send to the Internet is 25 megabytes (MB). This includes the message text, headers, and the attachment combined. These sizes cannot be changed.

550 “username” Is Not Accepting Mail From This Sender

This error indicates that the AOL member has configured his account, possibly inadvertently, to only accept mail from certain addresses and/or domains on the Internet. Using Mail Controls, he/she will have to modify these settings to receive e-mail from you. AOL Postmaster cannot override these member-defined settings. We respect our member's privacy and his/her ability to control his/her own mail. Postmaster cannot forward the mail for you.

550 Mailbox Not Found

This error indicates that the recipient's Username no longer exists or the address is misspelled.

550 Access denied

This error indicates that your site has been blocked from sending e-mail to your Internet Service Provider (ISP). Contact your e-mail administrator for assistance.

550 Sender domain not found in DNS

This error indicates that there are DNS resolution problems somewhere between your domain and AOL. This usually means that AOL is unable to resolve your domain name in DNS before accepting that mail for delivery.

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550 Requested action not taken: DNS FAILURE

This error indicates that there are DNS resolution problems somewhere between your domain and AOL. This usually means that AOL is unable to resolve your domain name in DNS before accepting that mail for delivery. Contact your e-mail administrator for assistance. The network administrator for the site may have to modify the resource records in DNS.

550 Service unavailable or SMTP error from remote mailer after initial connection

The information presently available to AOL indicates that this server is being used to transmit unsolicited e-mail to AOL. On the basis of the AOL's Unsolicited Bulk E-mail policy, AOL cannot accept further e-mail transactions from this server or domain. Please have your ISP/ASP or server admin visit http://postmaster.info.aol.com for more information. If you are receiving the above bounce message, please check our AOL SMTP Error Messages page to determine what is causing your e-mail issue.

452 Requested action not taken

This error indicates that your mail server or your ISP's mail server has insufficient disk space. Please contact your ISP or system administrator.

500 Syntax error, command unrecognized

This may include errors such as command line too long. Please contact your ISP or system administrator to help resolve this issue.

Unknown Host

This message may appear when the “domain.com” section of an e-mail address contains spelling errors. It is also possible that the computers located at that Internet address are temporarily unavailable (could be due to a technical failure).

Unknown User

This message may appear either when the “user_name” section of the e-mail address contains spelling errors or the e-mail address no longer exists.

Service Unavailable

This message typically appears when the receiving site is temporarily down.

Unbalanced

This message may appear when the address contains extraneous quotation marks or parentheses.

Cannot Send for XX Days

This message is usually displayed when the AOL® service is having trouble communicating with the site that you are trying to send the e-mail to. Mostly, this error indicates an issue with the Web site receiving the e-mail. It is recommended to contact the postmaster team of that particular Web site to resolve this issue.

Unrecoverable Error

This message generally appears when the e-mail left the AOL service successfully, but critical errors occurred within the receiving system.

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