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by Labsy
Sun Sep 09, 2018 8:00 pm
Forum: Administrators
Topic: [SOLVED] HELP NEEDED: Nothing goest through after proxy reconfiguration
Replies: 10
Views: 1913

Re: HELP NEEDED: Nothing goest through after proxy reconfiguration

The command to run on the proxy server to have http-to-https redirection on the web proxy is actually: zmprov ms `zmhostname` zimbraReverseProxyMailMode redirect If you set the variable to https, that means users will need to type https://fqdn... in their browser, as Zimbra will no longer respond o...
by Labsy
Sun Sep 09, 2018 7:56 pm
Forum: Administrators
Topic: [SOLVED] HELP NEEDED: Nothing goest through after proxy reconfiguration
Replies: 10
Views: 1913

Re: HELP NEEDED: Nothing goest through after proxy reconfiguration

I've tried reinstalling ZCS 8.8.7, but still no go.
Now LOCAL telnet responds, but no SMTP banner is presented....weird:

Code: Select all

telnet> o 10.10.11.50 25
Trying 10.10.11.50...
Connected to 10.10.11.50.
Escape character is '^]'.
by Labsy
Sun Sep 09, 2018 6:37 pm
Forum: Administrators
Topic: [SOLVED] HELP NEEDED: Nothing goest through after proxy reconfiguration
Replies: 10
Views: 1913

[SOLVED] HELP NEEDED: Nothing goest through after proxy reconfiguration

Hi, since yesterday I've had perfectly functional ZCS 8.8.7 Then I've reconfigured HTTP to HTTPS redirection by issuing the following and restarting proxy: zmprov ms `zmhostname` zimbraReverseProxyMailMode https Since then nothing goes thru! Cannot connect to ports 25, 465 or 587 - SMTP timeout , ei...
by Labsy
Thu Mar 29, 2018 9:37 pm
Forum: Administrators
Topic: Local delivery fail on SPF, DMARC and RDNS
Replies: 1
Views: 521

Local delivery fail on SPF, DMARC and RDNS

Hi, I thought I solved the problem of local-to-local delivery, when mails were tagged SPAM due to amavis failures...but here we go again. Most of local-to-local mails fail within the following categories: DMARC_FAIL_REJECT RDNS_NONE SPF_FAIL For example, this domain has SPF 100% correct, but still g...
by Labsy
Tue Mar 20, 2018 10:37 pm
Forum: Administrators
Topic: SpamAssassin scores RDNS_NONE even for local delivery?
Replies: 2
Views: 1224

Re: SpamAssassin scores RDNS_NONE even for local delivery?

Excellent, thank you! That's way better than lowering RDNS_NONE score.
by Labsy
Tue Mar 20, 2018 7:09 pm
Forum: Administrators
Topic: SpamAssassin scores RDNS_NONE even for local delivery?
Replies: 2
Views: 1224

SpamAssassin scores RDNS_NONE even for local delivery?

Hi, yet another topic on latest changes to spam fighting mechanisms. Earlier in few posts I mentioned, that after upgrade to 8.8.7 users complain for random messages being discarded due to high spam score. Now I have opportunity to catch some. This one is interesting, because it was sent from my own...
by Labsy
Tue Mar 20, 2018 1:40 am
Forum: Administrators
Topic: Connection error 421 4.7.0 too many errors
Replies: 5
Views: 5240

Re: Connection error 421 4.7.0 too many errors

Oh, me stupido... I am a bit ashamed as this was my error - I copy-pasted email addresses from Excel, which forced 'single quotes' with each address, rendering hundreds of address errors on postfix. That's why server disconnected me! Luckily I have my own handy mail parser, which I wrote in PHP some...
by Labsy
Sun Mar 18, 2018 6:11 pm
Forum: Administrators
Topic: Connection error 421 4.7.0 too many errors
Replies: 5
Views: 5240

Re: Connection error 421 4.7.0 too many errors

Well, this error pops up in my Outlook, when I send mail to all Zimbra users. I guess there are many non-existent accounts on my list, but I expect NDR, not connection refusal. I've checked - noone received my mail , BCC addressed to all zimbra users. ...but on the other hand, if this is some new fe...
by Labsy
Fri Mar 16, 2018 11:32 pm
Forum: Administrators
Topic: Connection error 421 4.7.0 too many errors
Replies: 5
Views: 5240

Re: Connection error 421 4.7.0 too many errors

I reviewd the bug reports and found nothing suitable. Also my external Zimbra FQDN is the same as internal one. But still error 421 is related to SNI support, introduced with Zimbra 8.6, if I am not mistaken. On the other hand, I found something totaly different, SMTP related: zimbra code error 421-...
by Labsy
Fri Mar 16, 2018 10:19 am
Forum: Administrators
Topic: Connection error 421 4.7.0 too many errors
Replies: 5
Views: 5240

Connection error 421 4.7.0 too many errors

Hi,

is there some new limitation with ZCS 8.8.7, probably nginx limiting connections?
When I try to send BCC mail to 300 recipients, I get Outlook error 421 4.7.0 too many errors. Outlook refuses to connect to IMAP from there on.

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