Hi Sébastien, Just wanted to let you know that you’re not the only one affected. We’re on the same boat.
On our side, while we wait for an answer to our ticket (opened Friday), we’re rotating the IP used for outgoing mails to bluewin/bluemail so that our customers don’t have to wait too long for a delivery. Before the changes at bluewin, everything was going thorough a single outgoing IP with no trouble. Maybe the big players are not affected because they already have pools of outgoing IPs and switch automatically between them. Or maybe the new spam filter is not really well tuned for senders of our size (Our volume of emails to bluewin is on the order of 1000-3000/day, are you in that range as well ?). I hope you/we find a solution soon! Kind regards, Florian -- TiZoo Sàrl - AlpHosting > Le 7 avr. 2021 à 09:50, Sébastien Riccio <s...@swisscenter.com> a écrit : > > Hello Swinog, > > All our customer e-mails to bluewin mails are delayed with "451 4.2.0 sc965: > IP reputation ratelimit in effect" until it finally gives up (some of them > never get through) We have currently a lot of support tickets and complaints > from our customers because of this. > > It's the 3rd time it happens in two weeks and we found evidence of unusual > SPAM activity from our servers that would justify such a > ratelimiting/rejecting. > > We spend a lot of resources on keeping our servers clean. They aren't listed > in any blacklist. The overall reputation is good (senderscore, talos > intelligence, abusix....) Also we're far from having the same outgoing > volume as would have big players (and common source of spam) like gmail, > outlook, etc. and they don't seems to be affected by the same issue when > sending to bluewin ?? > > Could it be there some kind of whitelisting for these senders at bluewin? If > yes, can our servers also be whitelisted from this ? > > Of course, I understand the need to protect servers from SPAM but actually > it is also affecting legit senders and causing a lot of trouble. > > Kind regards, > > Sébastien RICCIO > SYSTEM ADMINISTRATOR > P +41 840 888 888 > F +41 840 888 000 > M sric...@swisscenter.com > > > -----Message d'origine----- > De : swinog-boun...@lists.swinog.ch <swinog-boun...@lists.swinog.ch> De la > part de Marc SCHAEFER > Envoyé : mercredi, 31 mars 2021 14:44 > À : swinog@lists.swinog.ch > Objet : Re: [swinog] Mail rejection at bluewin > > On Wed, Mar 31, 2021 at 02:06:24PM +0200, Tobi wrote: >> We're seeing the same issue since 28th March. Looks like their new >> reputation system needs some fine tuning by a big hammer :-) Maybe >> they bought the same reputation system as 1&1 did not long ago. > > They communicated as follows: > > "Due to a heavy spam wave before and over the weekend around the 27th of > March, Bluewin Mail was forced to temporarily tighten up its policy for > large senders. > As of today, these rules have been lifted and sending to Bluewin Mail should > not lead to rejects or defers anymore. > > If you still experience issues sending to Bluewin Mail as of today > [tuesday], please open up another ticket on our support portal > (support.bluewin.ch). " > > I concur there were more spams last week-end than usual, the catched-up list > was about twice as long, and 2 phishing attempts went through on my mail > server. > > > _______________________________________________ > swinog mailing list > swinog@lists.swinog.ch > http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog > > > > > _______________________________________________ > swinog mailing list > swinog@lists.swinog.ch > http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog _______________________________________________ swinog mailing list swinog@lists.swinog.ch http://lists.swinog.ch/cgi-bin/mailman/listinfo/swinog
