Account blocked from receiving mail ? unknown or illegal alias?

%3CLINGO-SUB%20id%3D%22lingo-sub-873351%22%20slang%3D%22en-US%22%3EAccount%20blocked%20from%20receiving%20mail%20%3F%20unknown%20or%20illegal%20alias%3F%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-873351%22%20slang%3D%22en-US%22%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3EI%20am%20in%20the%20process%20of%20moving%20a%20small%20office%20from%20a%20local%20ISP%20(call%20them%20%22Local-ISP.com%22%20)%20who%20had%20been%20providing%20connectivity%2C%20email%2C%20and%20web%20hosting.%20We%26nbsp%3Bhave%20moved%20to%20a%20different%20large%20national%20(Canadian)%20ISP%20for%20connectivity%20(call%20them%20%22nat-ISP.ca%22)%2C%20but%20moved%20our%20email%20to%20Office%20365%20Business%20and%20our%20web%20hosting%20to%20a%20local%20web%20hosting%20provider.%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3E%26nbsp%3B%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3EEmail%20seems%20to%20be%20working%20for%20the%20most%20part.%20Messages%20sent%20to%20someone%40our-office.com%20do%20get%20delivered%20to%20the%20mailboxes%20and%20people%20can%20sign%20into%20%3CA%20href%3D%22http%3A%2F%2Foffic.com%2F%22%20target%3D%22_blank%22%20rel%3D%22noopener%20nofollow%20noopener%20noreferrer%20noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttp%3A%2F%2Foffic.com%2F%3C%2FA%3E%20to%20see%20them.%20We%20ran%20for%20a%20while%20without%20changing%20our%20mx%20records%20away%20from%20Local-ISP.com%20and%20having%20mail%20being%20forwarded%20from%26nbsp%3BLocal-ISP.com%20on%20a%20per-mailbox%20basis%20to%26nbsp%3Bsomeone%40our-office.onmicrosoft.com%2C%20but%20now%20our%20mx%20records%20point%20properly%20to%20microsoft%20and%26nbsp%3BLocal-ISP.com%20is%20out%20of%20the%20picture%20as%20far%20as%20email%20is%20concerned.%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3E%26nbsp%3B%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3EHere%20is%20the%20problem.%20We%20have%20a%20printer%2Fscanner%20in%20the%20office%20which%20is%20set%20to%20use%20smtp.nat-ISP.ca%20for%20outgoing%20email.%20This%20seems%20to%20be%20working%20to%20deliver%20scanned%20documents%20to%20everyone%20with%20pretty%20much%20any%20email%20address%3A%20gmail.com%2C%20icloud.com%2C%20outlook.com%20and%20even%20other-company.com%20which%20is%20hosted%20by%20Office%20365.%20However%20when%20we%20send%20to%20anyone%40our-office.com%20we%20get%20nothing.%20With%20the%20return%20address%20of%20the%20scanner%20set%20as%26nbsp%3Bsomeone%40our-office.com%20deliveries%20to%26nbsp%3Banyone%40our-office.com%20do%20not%20get%20through%2C%20but%20all%20other%20deliveries%20do.%20Withe%20the%20return%20address%20of%20the%20scanner%20set%20as%20someone%40somewhere-else.com%20again%20deliveries%20to%20anyone%40our-office.com%20do%20not%20get%20through%2C%20but%20all%20other%20deliveries%20do%2C%20but%20the%26nbsp%3Bsomeone%40somewhere-else.com%20gets%20an%20error%20message%20sent%20by%20the%20smtp.nat-ISP.ca%20machine%20saying%20either%3A%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3E%26nbsp%3B%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3EDiagnostic-Code%3A%20smtp%3B%205.1.0%20-%20Unknown%20address%20error%20550-'4.2.1%20%22Account%20blocked%20from%20receiving%20mail%20%22%3A%20someone%40our-office.com'%20(delivery%26nbsp%3Battempts%3A%200)%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3E%26nbsp%3B%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3Eor%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3E%26nbsp%3B%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3EDiagnostic-Code%3A%20smtp%3B%205.1.0%20-%20Unknown%20address%20error%20550-'5.1.1%20unknown%20or%20illegal%20alias%3A%26nbsp%3Bsomeone-else%40our-office.com'%20(delivery%20attempts%3A%200)%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3E%26nbsp%3B%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3ENote%2C%20this%20is%20not%20using%20the%20info%20on%20setting%20up%20a%20fax%2Fscanner%2Fetc%20to%20send%20using%20the%20Microsoft%20servers%20as%20detailed%20here%3A%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3E%26nbsp%3B%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3E%3CA%20href%3D%22https%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fexchange%2Fmail-flow-best-practices%2Fhow-to-set-up-a-multifunction-device-or-application-to-send-email-using-office-3%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noopener%20noreferrer%20noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fexchange%2Fmail-flow-best-practices%2Fhow-to-set-up-a-multifunction-device-or-application-to-send-email-using-office-3%3C%2FA%3E%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3E%26nbsp%3B%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3EIn%20this%20case%20we%20are%20using%20the%26nbsp%3Bsmtp.nat-ISP.ca%20server%20to%20send%20the%20message.%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3E%26nbsp%3B%3C%2FDIV%3E%3CDIV%20class%3D%22ApplePlainTextBody%22%3EDoes%20anyone%20have%20any%20idea%20why%20I%20am%20getting%20these%20rejection%20notices%3F%20Why%20does%20one%20address%20get%204.2.1%20%22Account%20blocked%20from%20receiving%20mail%22%20and%20the%20other%20gets%20%26nbsp%3B5.1.1%20unknown%20or%20illegal%20alias%3F%3C%2FDIV%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-873351%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EExchange%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EOffice%20365%20Network%20Connectivity%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-876129%22%20slang%3D%22en-US%22%3ERe%3A%20Account%20blocked%20from%20receiving%20mail%20%3F%20unknown%20or%20illegal%20alias%3F%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-876129%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F413924%22%20target%3D%22_blank%22%3E%40j-beda%3C%2FA%3E%26nbsp%3B%3C%2FP%3E%3CP%3EOne%20answer%20would%20be%20to%20get%20an%20Exchange%20Online%20mailbox%20for%20your%20copier%20and%20set%20that%20mailbox%20username%20address%20and%20password%20on%20the%20copier.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EI%20looked%20at%20this%20as%20an%20option%20but%20we%20didn't%20want%20the%20extra%20cost%20as%20we%20are%20a%20small%20business.%26nbsp%3B%20We%20now%20use%20a%20shared%20mailbox%20email%20address%20and%20staff%20have%20to%20email%20themselves%20the%20attachment%20and%20then%20send%20it%20from%20Outlook%20to%20external%20recipients.%3C%2FP%3E%3C%2FLINGO-BODY%3E
Highlighted
Occasional Visitor
I am in the process of moving a small office from a local ISP (call them "Local-ISP.com" ) who had been providing connectivity, email, and web hosting. We have moved to a different large national (Canadian) ISP for connectivity (call them "nat-ISP.ca"), but moved our email to Office 365 Business and our web hosting to a local web hosting provider.
 
Email seems to be working for the most part. Messages sent to someone@our-office.com do get delivered to the mailboxes and people can sign into http://offic.com/ to see them. We ran for a while without changing our mx records away from Local-ISP.com and having mail being forwarded from Local-ISP.com on a per-mailbox basis to someone@our-office.onmicrosoft.com, but now our mx records point properly to microsoft and Local-ISP.com is out of the picture as far as email is concerned.
 
Here is the problem. We have a printer/scanner in the office which is set to use smtp.nat-ISP.ca for outgoing email. This seems to be working to deliver scanned documents to everyone with pretty much any email address: gmail.com, icloud.com, outlook.com and even other-company.com which is hosted by Office 365. However when we send to anyone@our-office.com we get nothing. With the return address of the scanner set as someone@our-office.com deliveries to anyone@our-office.com do not get through, but all other deliveries do. Withe the return address of the scanner set as someone@somewhere-else.com again deliveries to anyone@our-office.com do not get through, but all other deliveries do, but the someone@somewhere-else.com gets an error message sent by the smtp.nat-ISP.ca machine saying either:
 
Diagnostic-Code: smtp; 5.1.0 - Unknown address error 550-'4.2.1 "Account blocked from receiving mail ": someone@our-office.com' (delivery attempts: 0)
 
or
 
Diagnostic-Code: smtp; 5.1.0 - Unknown address error 550-'5.1.1 unknown or illegal alias: someone-else@our-office.com' (delivery attempts: 0)
 
Note, this is not using the info on setting up a fax/scanner/etc to send using the Microsoft servers as detailed here:
 
 
In this case we are using the smtp.nat-ISP.ca server to send the message.
 
Does anyone have any idea why I am getting these rejection notices? Why does one address get 4.2.1 "Account blocked from receiving mail" and the other gets  5.1.1 unknown or illegal alias?

 

1 Reply
Highlighted

@j-beda 

One answer would be to get an Exchange Online mailbox for your copier and set that mailbox username address and password on the copier.

 

I looked at this as an option but we didn't want the extra cost as we are a small business.  We now use a shared mailbox email address and staff have to email themselves the attachment and then send it from Outlook to external recipients.