Many good emails rejected

Question

Hello,

since a few days we have a problem with emails which are directly rejected as Spam with no further reason. The sender of the emails are known business partners and we communicate often with them. 
 We did no change on the utm recently but the amount of falsely rejected mails are just to high to put them manually on a whitelist ask our partners everytime to send it again. 
 What is going on with the spam filter definitions?

twister5800 · Accepted Answer

Thanks for this :-) 
 "ctasd reports 'Bulk'" means that the 3rd party antispam solution that Sophos uses called formerly Commtouch, now Cyren, has flagged theese mails as "Bulk" mails. i have seen this often, i have tried calling Cyren many times with no luck, so what you can do is this - if the mails er legit: 
 
 - Create exception for domain to skip Antispam alone, not all the other antispam features :-) 
 - Contact cyren to ask them delist, first lookup here https://www.cyren.com/security-center#spam: 
 Normally this stop after a day or two, if more domains sending legit emails are blocked.

Many good emails rejected

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