Office 365 SMTP client more than 10 minutes to send mail with 50kb - Microsoft Community

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hi,

we using smtp.office365.com client send mail out application.

but when send mail attachment, it'll take more 10 minutes send mail.

please check , revert me back.

thanks & regards,

pandiyan t 

hi pandiyan t,

it seems issue related application.

in office 365, there no filter or setting applies attachment specially. it's hard whether application using have or not. please check whether application have specific settings affect email processing or attachment. can provide message header here can analyze , check when delay occurs.

thanks,

lance



Office / Office 365 for admins / Other/unknown / Office 365 for business



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