Unable to send email to Teams channel

%3CLINGO-SUB%20id%3D%22lingo-sub-312534%22%20slang%3D%22en-US%22%3EUnable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-312534%22%20slang%3D%22en-US%22%3E%3CP%3EI%20am%20owner%20of%20the%20Teams.%20I%20get%20the%20fol%20error%20msg%3A%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3ERemote%20Server%20returned%20'554%205.4.182%20Problem%20occurred%20during%20the%20delivery.%20Exception%20Message%3AThe%20remote%20server%20returned%20an%20error%3A%20(400)%20Bad%20Request.'%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3ECan%20anyone%20help%20%3F%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EThanks%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-312534%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EMicrosoft%20Teams%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-312986%22%20slang%3D%22en-US%22%3ERe%3A%20Unable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-312986%22%20slang%3D%22en-US%22%3E%3CP%3EHello%20Vesa%2C%3C%2FP%3E%3CP%3Ethanks%20for%20your%20reply.%3C%2FP%3E%3CP%3EWill%20try%20re-creating%20the%20email%20address%2C%20but%20I%20think%20I%20will%20also%20open%20a%20ticket%20with%20MS%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-312985%22%20slang%3D%22en-US%22%3ERe%3A%20Unable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-312985%22%20slang%3D%22en-US%22%3E%3CP%3EHello%20Chris%2C%3C%2FP%3E%3CP%3Ethanks%20for%20your%20reply.%3C%2FP%3E%3CP%3EYes%20all%20those%20settings%20are%20ok.%3C%2FP%3E%3CP%3EThink%20will%20open%20ticket%20with%20MS.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-312834%22%20slang%3D%22en-US%22%3ERe%3A%20Unable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-312834%22%20slang%3D%22en-US%22%3E%3CP%3EThere%20are%20two%26nbsp%3Bplaces%20where%20email%20settings%20exist%3C%2FP%3E%0A%3CP%3E1.%20Teams%20Admin%20center.%20Check%20that%20you%20have%20no%20domains%20there%20(or%20you%20are%20sending%20email%20from%20allowed%20domain)%3C%2FP%3E%0A%3CP%3E2.%20Channel%20email%20settings%20(advanced)%20as%20Chris%20stated%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3EAnd%20have%20you%20tried%20removing%20the%20email%20address%20for%20the%20channel%20and%20recreating%20it%3F%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3EIt%20might%20be%20also%20worth%20trying%20to%20send%20email%20from%20different%20clients%2Faccounts%2Fsystems%20to%20check%20if%20it%20is%20sender%20or%20receiver%20related.%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-312832%22%20slang%3D%22en-US%22%3ERe%3A%20Unable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-312832%22%20slang%3D%22en-US%22%3EAssume%20you%20are%20sending%20email%20to%20the%20channel%20from%20your%20internal%20domain%20email%3F%20Or%20from%20an%20external%20domain%20to%20the%20team%3F%20If%20external.%20Right%20click%20channel%20and%20get%20email%20and%20there%20should%20be%20an%20advanced%20link%20%2F%20tab%20where%20you%20can%20edit%20to%20allow%20more%20than%20just%20internal.%20Might%20not%20be%20it.%20But%20worth%20checking%20the%20setting%20to%20see.%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-312602%22%20slang%3D%22en-US%22%3ERe%3A%20Unable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-312602%22%20slang%3D%22en-US%22%3E%3CP%3EThanks%20for%20your%20response%2C%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3Econnector%2Fwebhook%20...%20not%20my%20speciality%20...%20Will%20ahve%20to%20look%20into%20another%20tool.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-312584%22%20slang%3D%22en-US%22%3ERe%3A%20Unable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-312584%22%20slang%3D%22en-US%22%3E%3CP%3EThat%20functionality%20has%20always%20been%20borked%2C%20for%20example%20the%20last%20test%20email%20I%20sent%20to%20one%20of%20my%20teams%20few%20days%20back%20is%20yet%20to%20arrive%2C%20and%20I%20haven't%20received%20any%20NDRs%20either.%20Message%20trace%20of%20course%20shows%20it%20being%20handed%20to%20the%20emea-teams-ms.mail.protection.outlook.com%20MTA%2C%20and%20that's%20it%2C%20black%20hole.%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3EI'd%20recommend%20using%20a%20connector%2Fwebhook%20instead%2C%20where%20possible.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-312583%22%20slang%3D%22en-US%22%3ERe%3A%20Unable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-312583%22%20slang%3D%22en-US%22%3EIt%20should%20mean%20all!%20No%20input%20required!%3CBR%20%2F%3E%3CBR%20%2F%3EAdam%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-312561%22%20slang%3D%22en-US%22%3ERe%3A%20Unable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-312561%22%20slang%3D%22en-US%22%3E%3CP%3EThanks%20Adam%20for%20your%20reply%2C%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EYes%20I%20have%20and%20it%20is.%20Do%20you%20know%20if%20we%20have%20to%20specify%20accepted%20SMTP%20domains%20or%20if%20we%20leave%20it%20blank%2C%20it%20means%20%22All%22%20%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-312555%22%20slang%3D%22en-US%22%3ERe%3A%20Unable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-312555%22%20slang%3D%22en-US%22%3EHave%20you%20verified%20this%20is%20allowed%20in%20settings%3F%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-312551%22%20slang%3D%22en-US%22%3ERe%3A%20Unable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-312551%22%20slang%3D%22en-US%22%3E%3CP%3EI%20get%20this%20error%20when%20I%26nbsp%3Bsend%20email%20to%20Teams%20channel%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-312546%22%20slang%3D%22en-US%22%3ERe%3A%20Unable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-312546%22%20slang%3D%22en-US%22%3ENot%20much%20we%20can%20do%20here...when%20do%20you%20get%20that%20error%3F%20I%20would%20recommend%20you%20to%20open%20a%20support%20ticket%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1523827%22%20slang%3D%22en-US%22%3ERe%3A%20Unable%20to%20send%20email%20to%20Teams%20channel%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1523827%22%20slang%3D%22en-US%22%3E%3CP%3EHave%20you%20been%20able%20to%20find%20a%20solution%3F%20We%20are%20having%20the%20same%20mysterious%20problem%20as%20well.%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F75429%22%20target%3D%22_blank%22%3E%40Chantal%20Belanger%3C%2FA%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E
Highlighted
Occasional Contributor

I am owner of the Teams. I get the fol error msg:

 

Remote Server returned '554 5.4.182 Problem occurred during the delivery. Exception Message:The remote server returned an error: (400) Bad Request.'

 

Can anyone help ?

 

Thanks

 

12 Replies
Highlighted
Not much we can do here...when do you get that error? I would recommend you to open a support ticket
Highlighted

I get this error when I send email to Teams channel

Highlighted
Have you verified this is allowed in settings?
Highlighted

Thanks Adam for your reply,

 

Yes I have and it is. Do you know if we have to specify accepted SMTP domains or if we leave it blank, it means "All" ?

Highlighted
It should mean all! No input required!

Adam
Highlighted

That functionality has always been borked, for example the last test email I sent to one of my teams few days back is yet to arrive, and I haven't received any NDRs either. Message trace of course shows it being handed to the emea-teams-ms.mail.protection.outlook.com MTA, and that's it, black hole.

 

I'd recommend using a connector/webhook instead, where possible.

Highlighted

Thanks for your response,

 

connector/webhook ... not my speciality ... Will ahve to look into another tool.

Highlighted
Assume you are sending email to the channel from your internal domain email? Or from an external domain to the team? If external. Right click channel and get email and there should be an advanced link / tab where you can edit to allow more than just internal. Might not be it. But worth checking the setting to see.
Highlighted

There are two places where email settings exist

1. Teams Admin center. Check that you have no domains there (or you are sending email from allowed domain)

2. Channel email settings (advanced) as Chris stated

 

And have you tried removing the email address for the channel and recreating it?

 

It might be also worth trying to send email from different clients/accounts/systems to check if it is sender or receiver related.

 

Highlighted

Hello Chris,

thanks for your reply.

Yes all those settings are ok.

Think will open ticket with MS.

Highlighted

Hello Vesa,

thanks for your reply.

Will try re-creating the email address, but I think I will also open a ticket with MS

Highlighted

Have you been able to find a solution? We are having the same mysterious problem as well. @Chantal Belanger