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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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24
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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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67
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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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494
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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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600
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March 17, 2024
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Mail does not send via smtp
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4
|
667
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March 15, 2024
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Multiple mail relays depending on sender's address
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3
|
665
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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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870
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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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344
|
April 28, 2022
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Security: SMTP Smuggling
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1
|
529
|
January 5, 2024
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UCS Mailserver - Postfix und Telekom - Kein Senden möglich
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4
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592
|
November 13, 2023
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How to prevent mail delivery for disabled user
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1
|
705
|
September 12, 2023
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HowTo implement "soft" quota for Dovecot
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1
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869
|
July 1, 2023
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Univention Postfix (Sender address rejected: not owned by user)
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3
|
654
|
February 2, 2023
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How-to: Reject all outgoing mail except one domain
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3
|
655
|
November 28, 2022
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Anmeldung mit Mailclient (e.g. Outlook, Thunderbird) nicht möglich
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2
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1057
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May 13, 2022
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Problem: Postfix not starting after upgrade from UCS4 to UCS 5
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1
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939
|
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
|
1556
|
February 18, 2022
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HowTo: Rate Limiting in Postfix
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1
|
7355
|
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
|
521
|
January 4, 2022
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Spamassassin not changing header
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0
|
404
|
October 26, 2021
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Spamassassin Configuration after Mailserver (or groupware) installation with Postfix
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0
|
963
|
October 17, 2021
|
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UCS + Kopano + t-online.de => searching best practise
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0
|
557
|
October 4, 2021
|
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How to use --> UCS Variable (mailForwardCopyToSelf)
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0
|
558
|
May 16, 2021
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Sending mail on behalf other domain
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2
|
700
|
March 25, 2021
|
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[Problem] Sending Mails to groups with other nested groups does not work
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1
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1586
|
March 22, 2021
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No undelivered mail return to sender
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3
|
558
|
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
|
652
|
January 31, 2021
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Migration of LDAP attribute mailForwardCopyToSelf
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1
|
940
|
January 11, 2021
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Konfiguration: Systembenachrichtigungen per E-Mail
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2
|
781
|
November 19, 2020
|
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Sender dependent relayhostmap korrekt nachbessern
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0
|
534
|
November 16, 2020
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