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Email to a gmail account comes back undeliverable "because it's spam".Kreslavsky has solution,how do I follow it?

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Every time I reply to my daughter's gmail account, the message comes back as undeliverable. Diagnostic code: smtp;550-5.7.1 [167.206.4.196 7] Our system has detected that this message is unsolicited mail. To reduce the amount of spam sent to Gmail, message has been blocked. Please visit for more information. wl5si11323916vec.16 - gsmtp

     Remote system: dns;gmail-smtp-in.l.google.com (TCP|167.206.4.196|50676|74.125.131.26|25) (mx.google.com ESMTP wl5si11323916vec.16 - gsmtp)

My account is @optonline. What can I do? Thank you

Every time I reply to my daughter's gmail account, the message comes back as undeliverable. Diagnostic code: smtp;550-5.7.1 [167.206.4.196 7] Our system has detected that this message is unsolicited mail. To reduce the amount of spam sent to Gmail, message has been blocked. Please visit for more information. wl5si11323916vec.16 - gsmtp Remote system: dns;gmail-smtp-in.l.google.com (TCP|167.206.4.196|50676|74.125.131.26|25) (mx.google.com ESMTP wl5si11323916vec.16 - gsmtp) My account is @optonline. What can I do? Thank you

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Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.


Further information can be found in the Troubleshoot Firefox issues caused by malware article.

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