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Eprs_Admin
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internal email relay problem

Hi Experts,

I have a problem with sending an email from a server to Exch2019.
When I send an email witout attachment, then it works.
When I send an email with attachment (PDF) then it fails.

Please can you help me to troubleshoot ?
Any Ideas ?
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Eprs_Admin

8/22/2022 - Mon
Eprs_Admin

ASKER
I get this error, when I check the receive connector log

Remote(SocketError)
Hello There

It might be a message or an attachment size limit
Bastiaan

Or an anti-virus solution which is throwing an error.. Check your logs.

Your help has saved me hundreds of hours of internet surfing.
fblack61
David Favor

As Hello There mentions...

If any SMTP MTA between your sender + recipient has a size threshold less than your attachment size, then your message won't be delivered.

As bleeuwen mentions, refer to your sending logs + also your receiver logs (if you're running the receiving MTA) for the exact reason for the failure.

Tip: Regarding logs, better to test, measure + know, than guess. Always refer to your logs for reasons for failures.

Tip: You can also use SWAKS to send your message on the command line, to see every step of your SMTP conversation in realtime, including any errors.
Jeff Glover

I would look on your Receive connector you are using for Relay and see what the maximum size limit is.
Eprs_Admin

ASKER
Hi All,

thanks for all the help and infos.
I could check it in powershell with send-mailmessage

This email with attachment was received :-)
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