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Mail server does not recognize root@ucs.intra.mydomain.tld as a valid sender
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0
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16
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January 18, 2026
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Problem: SASL authentication failure - SMTPS endpoint not reachable
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1
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54
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November 11, 2025
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Univention - Kopano Mailserver hinter Proxmox MailGateway
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2
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488
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May 4, 2024
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Postfix und Dovecot mit D-Trust Zertifikat
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1
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599
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March 17, 2024
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Mail does not send via smtp
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4
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652
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March 15, 2024
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Multiple mail relays depending on sender's address
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3
|
640
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March 13, 2024
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How-To: Configure Mail Relay With TLS
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2
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854
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March 12, 2024
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MTPolicy Configuration for LDAP mail sending quota
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0
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341
|
April 28, 2022
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Security: SMTP Smuggling
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1
|
522
|
January 5, 2024
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UCS Mailserver - Postfix und Telekom - Kein Senden möglich
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4
|
583
|
November 13, 2023
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How to prevent mail delivery for disabled user
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1
|
701
|
September 12, 2023
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HowTo implement "soft" quota for Dovecot
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1
|
858
|
July 1, 2023
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Univention Postfix (Sender address rejected: not owned by user)
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3
|
640
|
February 2, 2023
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How-to: Reject all outgoing mail except one domain
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3
|
647
|
November 28, 2022
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Anmeldung mit Mailclient (e.g. Outlook, Thunderbird) nicht möglich
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2
|
1046
|
May 13, 2022
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Problem: Postfix not starting after upgrade from UCS4 to UCS 5
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1
|
934
|
March 16, 2022
|
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HowTo: adjust the time until warnings or errors for temporarily undeliverable messages are sent
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3
|
1547
|
February 18, 2022
|
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HowTo: Rate Limiting in Postfix
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|
1
|
7255
|
January 28, 2022
|
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Q&A: Is there a way to use a UCR attribute to limit the number of emails a user can send?
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1
|
512
|
January 4, 2022
|
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Spamassassin not changing header
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0
|
401
|
October 26, 2021
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Spamassassin Configuration after Mailserver (or groupware) installation with Postfix
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|
0
|
960
|
October 17, 2021
|
|
UCS + Kopano + t-online.de => searching best practise
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0
|
554
|
October 4, 2021
|
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How to use --> UCS Variable (mailForwardCopyToSelf)
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0
|
556
|
May 16, 2021
|
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Sending mail on behalf other domain
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|
2
|
697
|
March 25, 2021
|
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[Problem] Sending Mails to groups with other nested groups does not work
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1
|
1577
|
March 22, 2021
|
|
No undelivered mail return to sender
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3
|
555
|
February 20, 2021
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Problem: Emails to a new email domain are always sent to the postmaster
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1
|
631
|
January 31, 2021
|
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Migration of LDAP attribute mailForwardCopyToSelf
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|
1
|
931
|
January 11, 2021
|
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Konfiguration: Systembenachrichtigungen per E-Mail
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|
2
|
775
|
November 19, 2020
|
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Sender dependent relayhostmap korrekt nachbessern
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0
|
533
|
November 16, 2020
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