Not able to send email to a specific user Account - Microsoft Community


hi,

one of users in organization not able send email specific user account. using outlook 2016, part of office 365 e3 subscription.

the following recipient(s) cannot reached:
 
            message not sent. try sending message again later, or contact network administrator. client operation failed. error [0x80070057-0x80070057-0x000501].

i add email address of recipient same person had left company might creating conflict. , issue faced 1 user in organization.

kindly help

regards,

ricky

hi ricky,

this error comes trying submit message on exchange transport. implies user having intermittent networking issue happened hit @ time message submitted.

  

this behavior expected when network failures occur. if use's computer connected via wireless or wan link, random failures on network can common, , explain behavior. on local area network, rpc failures not uncommon.

in general, problem caused intermittent network connectivity issues, or possibly out-of-resource problem on client machine.

so suggest check network environment see if there abnormal. can let user switch network environment check if issue persists.

meanwhile, please following tests , share results if possible.

1. let user send emails specific user in owa.

2. let user login pc works normally, error show again?

if issue exists in user's pc, please refer article below , see if workarounds work you.

https://support.microsoft.com/en-us/help/329936/


thanks,

lance



Office / Outlook / Windows 10 / Office 365 for business



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