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Can't send email - ZCS upstream server timeout

I can't send email in Thunderbird or webmail. I've logged a support ticket.

In Thunderbird it times out, and in webmail I get this error:

HTTP ERROR 504

Problem accessing ZCS upstream server. Reason: Cannot connect to the ZCS upstream server. Connection timeout.
Possible reasons:

upstream server is blocked by a firewall
upstream server is failing to send back the response in time
upstream server is down

Please contact your ZCS administrator to fix the problem.

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Adriaan Slabbert

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Seems to be working now. No response/update/info from support other than automated receipt.

Adriaan Slabbert 0 votes