Typical
Return Mail

RETURN MAILS AFTER SENDING
MESSAGES TO SKYFILE MAIL USERS

Please read all return mails carefully.

They come either from MAILER-DAEMON or POSTMASTER and always contain valuable information.

Look for one of the following phrases, and do not simply resend your e-mail without having read the following. Your local mail server might add its own, sometimes even misleading interpretation, but only this is relevant:

• Delivered mail(s) to …: No error! Your message has been retrieved by the SkyFile user. You will get this message only if confirmations are enabled for this user and a SkyFile user – either the same or another – has sent you an e-mail within the last few days.
• Access denied: The account requires a special keyword in the subject line, or e-mails are accepted from predefined addresses only. Please contact the owner or his company. Different reasons are possible (BWL means black&white list):
  • Access denied: not registered (mail to an Inmarsat-C address without being registered user)
  • Access denied: keyword (subject keyword missing or not correct)
  • Access denied: B&W Prepaid (not allowed due to personal prepaid BWL)
  • Access denied: B&W (not allowed due to postpaid BWL)
• Account renamed, use …: The account name before the @ character in the address has been renamed. Please replace the old name by the new one, the sub-account before it (if any) and the domain name remain unchanged.
• Blocked by spam filter: Some of the e-mail characteristics indicate spam. Send your e-mails as plain text instead of HTML or Rich text and use personal addressing (TO, CC) instead of blind copies (BCC).
• Content is blocked: Mail header lines are typical for spam e-mails, e.g. faked mail server names in a Received line, or suspicious words in the subject.
• Faked sender: If you are using an address at a large provider like AOL, GMX, Hotmail, Web.de or Yahoo, please make sure that you send your e-mail via the mail server of this provider.
• Invalid address: The destination address is syntactically wrong, e.g. illegal characters before @. Valid SkyFile usernames only contain alphanumerical characters, dashes, underscores and no or one dot.
• Invalid Helo: Your mail server must identify itself with its own fully qualified Internet domain name, including the top-level domain. Please ask the server administrator to correct the setting.
• Invalid sender: Your own mail address (appearing as “From” in your e-mails) is syntactically incorrect, e.g. invalid characters or missing domain name, which would make it impossible to answer.
• IP blacklisted in zen.spamhaus.org: Viruses or spam mails were sent from your server. After delisting its IP at the Spamhaus web page, the blocking may continue for 36 hours due to DNS caching.
• IP is blocked: We do not accept mails from dial-up hosts and dynamic IP addresses because these are typical for spam and viruses. Please send your mails via the SMTP smarthost of your provider.
• IP temporarily blocked: Your address is blocked for a while after too many errors, e.g. lots of mails to non-existing addresses. This may be the result of viruses or backscatter from your server.
• Mail expired – Your mail was not read within…: Your mail was deleted after a service-dependent number of days. Please inform Astrium Services if the account is no longer needed!
• Mail to … not retrieved within 24 hours: You will get this information if delivery notifications are enabled for the addressed SkyFile user and the mail was not retrieved within 24 hours. Please do not resend your e-mail since it is still available for retrieval.
• Mail too long: Try to omit large attachments, and do not send HTML e-mails. The allowed max. size depends on the recipient.
• Separate filters for subaccounts not supported: You must send a black&white list to the root account, not to one or more subaccounts.
• Sender blocked: Your sender address is invalid or was blacklisted, e.g. after unrequested newsletters, bulk mails or other sorts of frequent e-mail abuse.
• The attachment… has been deleted: The text was sent completely but an attachment file was superfluous, too large, or unwanted (e.g. Winmail.dat with Outlook-specific rich-text formatting; always use “plain text” as mail format).
• Try again later: If you ever see this message, your mail server does not handle greylisting correctly. Please ask the manufacturer for an update which does not interpret the SMTP code 451 as a final error and which sends return mails for final errors only.
• User does not exist: The user name (which is the part of the mail address before the “@” symbol) does not exist at the SkyFile Gateway in the LES. Please check your address list.
• User inactive: There was no satellite contact with this SkyFile user for at least three months, or the billing limit of the addressed postpaid subaccount has been reached. The user must dial the gateway at least once and/or change the limit.
• User mailbox full: The mailbox capacity for this user is exhausted. Please wait until the user has retrieved all his mails before sending your message again.
• Other return mails from a Mailer-Daemon or Postmaster other than the one at the LES are created if the domain name (the part of the address behind the “@” symbol) was wrong.