[操作疑難] telnet IP port 25

If tested a domain which cannot accept telnet ip 25.

is it mean other mail server die?

because our office have a domain which cannot send out a mail from yesterday, then I go to telnet their IP + port 25, but no any connection.


we are using Business Line, so our side don't have any blocking, and only this domain have problem.
thanks

本帖最後由 evantkh 於 2016-6-21 17:43 編輯

What error message are you getting when the e-mail is bounced?

Try sending an email to a gmail.com address. If there is a problem, you will need to contact your ISP for help. Have you received any warning about spam mail(may be caused by hackers)?

If only emails to that domain you are talking about have the problem, you will need to work with them to have it solved.

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