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internal email relay problem

Eprs_Admin
Eprs_Admin asked
on
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_AdminSystem Architect

Author

Commented:
I get this error, when I check the receive connector log

Remote(SocketError)
Hello ThereSystem Administrator
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Distinguished Expert 2018

Commented:
It might be a message or an attachment size limit
bleeuwen
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Commented:

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

David FavorFractional CTO
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Distinguished Expert 2019

Commented:
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 GloverSr. Systems Administrator
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Commented:
I would look on your Receive connector you are using for Relay and see what the maximum size limit is.
Eprs_AdminSystem Architect

Author

Commented:
Hi All,

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

This email with attachment was received :-)
System Architect
Commented:
I could check it in powershell with send-mailmessage

This email with attachment was received :-)