# Mail stopped working

**URL:** <https://help.nextcloud.com/t/mail-stopped-working/176896>\
**Category:** ℹ️ Support\
**Created:** [December 17, 2023, 3:18pm UTC](https://help.nextcloud.com/t/mail-stopped-working/176896 "2023-12-17T15:18:16Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![igordashaar](https://help.nextcloud.com/letter_avatar/igordashaar/32/6_22734026db12803ebb3e059622ac3534.png) [@igordashaar](https://help.nextcloud.com/u/igordashaar)\
**Post date:** [December 18, 2023, 9:05am UTC](https://help.nextcloud.com/t/mail-stopped-working/176896/6 "2023-12-18T09:05:29Z")

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Found another user with the same issue:

> [@Mail client cannot connect to SMTP server](https://help.nextcloud.com/t/mail-client-cannot-connect-to-smtp-server/175493):
>
> Nextcloud version: 27.1.3 (Snap) Operating system and version: Ubuntu 22.04 Apache or nginx version: Don’t know PHP version: Don’t know I have just set up a new Nextcloud instance using the snap package and everything but the SMTP mailer works flawlessly. When I try to test my settings using the “send email” button, I always get the response "A problem occurred while sending the email. Please revise your settings. (Error: Email could not be sent. Check your mail server log)" … after some…

Solution: disable IPV6 [https://linuxconfig.org/how-to-disable-ipv6-address-on-ubuntu-22-04-lts-jammy-jellyfish](https://linuxconfig.org/how-to-disable-ipv6-address-on-ubuntu-22-04-lts-jammy-jellyfish)

found out by trying to ping my smtp adress.  
`ping smpt.domain.com` resultet in a timeout.  
`ping -4 smpt.domain.com` worked.

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_[View the full topic](https://help.nextcloud.com/t/mail-stopped-working/176896)._