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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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8
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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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31
|
November 11, 2025
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Univention - Kopano Mailserver hinter Proxmox MailGateway
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2
|
476
|
May 4, 2024
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Postfix und Dovecot mit D-Trust Zertifikat
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1
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594
|
March 17, 2024
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Mail does not send via smtp
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4
|
626
|
March 15, 2024
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Multiple mail relays depending on sender's address
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3
|
599
|
March 13, 2024
|
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How-To: Configure Mail Relay With TLS
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2
|
823
|
March 12, 2024
|
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MTPolicy Configuration for LDAP mail sending quota
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0
|
338
|
April 28, 2022
|
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Security: SMTP Smuggling
|
|
1
|
508
|
January 5, 2024
|
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UCS Mailserver - Postfix und Telekom - Kein Senden möglich
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4
|
562
|
November 13, 2023
|
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How to prevent mail delivery for disabled user
|
|
1
|
695
|
September 12, 2023
|
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HowTo implement "soft" quota for Dovecot
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1
|
847
|
July 1, 2023
|
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Univention Postfix (Sender address rejected: not owned by user)
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|
3
|
613
|
February 2, 2023
|
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How-to: Reject all outgoing mail except one domain
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3
|
636
|
November 28, 2022
|
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Anmeldung mit Mailclient (e.g. Outlook, Thunderbird) nicht möglich
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2
|
1022
|
May 13, 2022
|
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Problem: Postfix not starting after upgrade from UCS4 to UCS 5
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1
|
931
|
March 16, 2022
|
|
HowTo: adjust the time until warnings or errors for temporarily undeliverable messages are sent
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3
|
1529
|
February 18, 2022
|
|
HowTo: Rate Limiting in Postfix
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|
1
|
7097
|
January 28, 2022
|
|
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
|
509
|
January 4, 2022
|
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Spamassassin not changing header
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0
|
397
|
October 26, 2021
|
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Spamassassin Configuration after Mailserver (or groupware) installation with Postfix
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0
|
938
|
October 17, 2021
|
|
UCS + Kopano + t-online.de => searching best practise
|
|
0
|
551
|
October 4, 2021
|
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How to use --> UCS Variable (mailForwardCopyToSelf)
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|
0
|
554
|
May 16, 2021
|
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Sending mail on behalf other domain
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|
2
|
685
|
March 25, 2021
|
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[Problem] Sending Mails to groups with other nested groups does not work
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|
1
|
1567
|
March 22, 2021
|
|
No undelivered mail return to sender
|
|
3
|
542
|
February 20, 2021
|
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Problem: Emails to a new email domain are always sent to the postmaster
|
|
1
|
619
|
January 31, 2021
|
|
Migration of LDAP attribute mailForwardCopyToSelf
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|
1
|
920
|
January 11, 2021
|
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Konfiguration: Systembenachrichtigungen per E-Mail
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|
2
|
768
|
November 19, 2020
|
|
Sender dependent relayhostmap korrekt nachbessern
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|
0
|
528
|
November 16, 2020
|