SMTP Error Code 550

smtp;550 5.1.1 <[email protected]>: user does not exist

smtp;550 5.7.1 [CS01] Message rejected due to local policy. Please visit https://support.apple.com/en-us/HT204137

smtp;550 5.7.1 Your message was rejected due to example.com’s DMARC policy. See https://support.apple.com/en-us/HT204137 for info

High severity

smtp;550 5.7.1 Your email was rejected due to having a domain present in the Spamhaus DBL -- see https://www.spamhaus.org/dbl/

Critical severity

smtp;550 5.2.1 <[email protected]>... Addressee unknown, relay=[x.xx.xx.xx]

smtp;550 5.2.1 <[email protected]>... blank mailhost - invalid address, relay=[x.xx.xx.xx]

smtp;550 5.7.1 Connections not accepted from servers without a valid sender domain. ## Fix reverse DNS for x.xx.xx.xx

High severity

smtp;550 5.1.1 Not our Customer

Low severity

smtp;550 5.1.1 <[email protected]> recipient mailbox unallocated

smtp;550 5.2.0 Message rejected due to DMARC. Please see http://postmaster.comcast.net/smtp-error-codes.php#DM000001

High severity

smtp;550 5.2.0 <[email protected]> - Recipient unavailable

smtp;550 spam detected

Medium severity

smtp;550 5.2.2 user quota exceeded

smtp;550 5.2.1 This mailbox has been blocked due to inactivity

Low severity

smtp;550 virus detected

Critical severity

smtp;550 Requested action not taken: mailbox unavailable

Requested action not taken: mailbox unavailable Reject due to policy restrictions.

smtp;550 5.1.1 The email account that you tried to reach does not exist. Please try double-checking the recipient's email address for typos or unnecessary spaces. Learn more at https://support.google.com/mail/?p=NoSuchUser - gsmtp

smtp;550 5.2.1 The email account that you tried to reach is disabled. Learn more at https://support.google.com/mail/?p=DisabledUser - gsmtp

smtp;550 5.2.1 The user you are trying to contact is receiving mail at a rate that prevents additional messages from being delivered. For more information, please visit https://support.google.com/mail/?p=ReceivingRatePerm - gsmtp

High severity

smtp;550 5.7.1 [x.xx.xx.xx] Our system has detected that this message is likely suspicious due to the very low reputation of the sending domain. To best protect our users from spam, the message has been blocked. Please visit https://support.google.com/mail/answer/188131 for more information. - gsmtp

Critical severity

smtp;550 5.7.1 [x.xx.xx.xx] Our system has detected that this message is likely unsolicited mail. To reduce the amount of spam sent to Gmail, this message has been blocked. Please visit https://support.google.com/mail/?p=UnsolicitedMessageError for more information. - gsmtp

Critical severity

smtp;550 5.7.1 Unauthenticated email from example.com is not accepted due to domain's DMARC policy. Please contact the administrator of example.com domain if this was a legitimate mail. Please visit https://support.google.com/mail/answer/2451690 to learn about the DMARC initiative. - gsmtp

High severity

smtp;550 5.7.1 [x.xx.xx.xx 14] Messages missing a valid address in From: header, or having no From: header, are not accepted. - gsmtp

smtp;550 5.1.1 <[email protected]>: Recipient address rejected: User unknown

Low severity

smtp;550-SPF-check failed: 550 example.com doesn't allow sending mails from xx.xx.xx.xx (in reply to MAIL FROM command)

smtp;550 5.7.1 Message considered as SPAM

smtp;550 5.7.1 rejected by DMARC policy for example.com (in reply to end of DATA command),

smtp;550 Message was not accepted -- invalid mailbox. Local mailbox [email protected] is unavailable: account is disabled

Low severity

smtp;550 spam message rejected. Please visit http://help.mail.ru/notspam-support/id?c=7y4ytdHbuOGv3O50NYTwpz1F-TVIpnactxtFPeFQSDYMAAAAaKgAAOX_3hE~ or report details to [email protected]. Error code: ###. ID: #

High severity

smtp;550 Message was not accepted -- invalid mailbox. Local mailbox [email protected] is unavailable: account is disabled

smtp;550 5.2.0 Mail rejete. Mail rejected. ofr_506 [506]

smtp;550 5.1.1 Adresse d au moins un destinataire invalide. Invalid recipient. OFR_416 [416]

smtp;550 mwinfXXXX ME Adresse IP source bloquee pour incident de spam. Client host blocked for spamming issues. OFR006_102 Ref http://csi.cloudmark.com/reset-request/?ip=xxx.xxx.xxx.xxx [102]

High severity

smtp;550 5.5.0 Requested action not taken: mailbox unavailable. [#.eop-nam12.prod.protection.outlook.com]

smtp;550 5.7.1 Service unavailable, MailFrom domain is listed in Spamhaus. To request removal from this list see https://www.spamhaus.org/query/lookup/ (S8002) [#.eop-nam02.prod.protection.outlook.com]

Critical severity

smtp;550 5.7.1 Unfortunately, messages from [x.xx.xx.xx] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3150). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. [#.eop-nam02.prod.protection.outlook.com]

High severity

smtp;550 5.4.1 All recipient addresses rejected : Access denied [#.eop-nam02.prod.protection.outlook.com]

Medium severity

smtp;550 5.7.1 Rejected by spam filter (in reply to end of DATA command)

smtp;550 Mail is rejected by recipients

smtp;550 Mailbox unavailable or access denied

smtp;550 Mailbox not found. http://service.exmail.qq.com/cgi-bin/help?subtype=1&&id=20022&&no=1000728

smtp;550 Mail content denied. http://service.exmail.qq.com/cgi-bin/help?subtype=1&&id=20022&&no=1000726

smtp;550 Sender frequency limited. http://service.exmail.qq.com/cgi-bin/help?subtype=1&&id=20022&&no=1000723

smtp;550 Suspected spam sender.

High severity

smtp;550 DMARC check failed http://service.mail.qq.com/cgi-bin/help?subtype=1&&no=1001508&&id=16.

High severity

smtp;550 5.1.1 Email address could not be found, or was misspelled (G8)

smtp;550 <[email protected]>: Reject due to SPF policy. The originating IP of the message is not permitted by the domain owner

smtp;550 <[email protected]>: Syntax error in parameters or arguments

smtp;550 <[email protected]>: Requested action not taken: mailbox unavailable

smtp;550 <[email protected]>: Bad DNS PTR resource record

smtp;550 <[email protected]>: Reject due to policy restrictions (header based)

smtp;550 <[email protected]>: Reject due to policy restrictions (domain based)

smtp;550 <[email protected]>: Reject due to policy restrictions (IP based)

smtp;550 <[email protected]>: Requested mail action aborted: exceeded storage allocation, Quota exceeded

smtp;550 <[email protected]>: IP address is block listed

smtp;550 <[email protected]>: Invalid DNS MX or A/AAAA resource record

smtp;550 relaying denied for <[email protected]>

smtp;550 5.7.1 Policy rejection on the target address

smtp;550 5.7.1 No such user!

smtp;550 5.7.1 Email rejected per DMARC policy for zoho.com

smtp;550 5.1.1 <[email protected]> User unknown

smtp;550 cuda_nsu 5.1.1 <[email protected]>... User unknown

Low severity

smtp;550 No such user ([email protected])

Low severity

smtp;550 Blocked

smtp;550 rejecting spoofed message

High severity

smtp;550 permanent failure for one or more recipients ([email protected]:blocked)

smtp;550 Invalid recipient <[email protected]> (#5.1.1)

smtp;550 5.4.1 [[email protected]]: Recipient address rejected: Access denied [example.com]

smtp;550 5.7.1 Service unavailable, Client host [x.xx.xx.xx] blocked using Spamhaus. To request removal from this list see https://www.spamhaus.org/query/ip/0.0.0.0 (AS16012611)

Critical severity

550 5.7.1 Service unavailable, Helo domain is listed in Spamhaus. To request removal from this list see https://www.spamhaus.org/query/lookup/ (S8001) [#.prod.protection.outlook.com]

Critical severity

smtp;550 5.7.606 Access denied, banned sending IP [x.xx.xx.xx]. To request removal from this list please visit https://sender.office.com/ and follow the directions. For more information please go to http://go.microsoft.com/fwlink/?LinkID=526655 (AS16012609)

Critical severity

smtp;550 5.7.26 <[email protected]>: ETP205 DMARC Failure for domain

smtp;550 Administrative prohibition - envelope blocked - https://community.mimecast.com/docs/DOC-1369#550 [#]

smtp;550 Rejected by header based Anti-Spoofing policy: [email protected] - https://community.mimecast.com/docs/DOC-1369#550 [#]

smtp;550 Rejected by header based manually Blocked Senders: [email protected] - https://community.mimecast.com/docs/DOC-1369#550 [#]

smtp;550 Envelope blocked - User Entry - https://community.mimecast.com/docs/DOC-1369#550 [#]

smtp;550 DMARC Sender Invalid - envelope rejected - https://community.mimecast.com/docs/DOC-1369#550 [#]

High severity

smtp;550 5.1.1 <email@example>: Recipient address rejected: User unknown

smtp;550 5.1.1 <[email protected]>: Recipient address rejected: undeliverable address: host example.com[x.xx.xx.xx] said: 550 5.1.1 <[email protected]>: Recipient address rejected: user unknown

smtp;550 5.1.1 User Unknown

smtp;550 5.1.1 - This is not a valid email address. Please verify that you have the correct email address for your recipient.

smtp;550 5.1.8 <[email protected]>: Sender address rejected: Domain not found (in reply to RCPT TO command)

High severity

smtp;550 5.1.8 Domain of sender address does not exist

High severity

smtp;550 5.5.2 <[email protected]>: Sender address rejected: need fully-qualified address (in reply to RCPT TO command)

High severity

smtp;550 5.7.0 Email rejected per sender's DMARC policy

High severity

smtp;550 5.7.1 <[email protected]>: Recipient address rejected: User email address is marked as invalid.

smtp;550 5.7.1 Relaying denied

smtp;550 5.7.1 Relay access denied

smtp;550 5.7.1 Service unavailable; client [x.xx.xx.xx] blocked using prs.proofpoint.com

High severity

smtp;550 5.7.1 Service unavailable; client [x.xx.xx.xx] blocked using Cloudmark Sender Intelligence (Visit http://csi.cloudmark.com/reset-request/ if you feel this is in error)

High severity

smtp;550 5.7.1 <[email protected]>: Recipient address rejected: ERS-Customized-Block.