<![CDATA[Error saving mail display name with comma: `mailbox display name is not valid`]]>I noticed that when I try to set an email display name for a Cloudron app like WordPress that it won't allow values with commas in it. I'm trying to set the legal business name, but for some reason this is not working. The error I see in the user interface is mailbox display name is not valid. Interesting it accepts the ampersand (&), but not the comma (,) characters.

Is this intended behaviour though? It seems like a defect to me because I can't imagine why commas are not valid "From Display Name" characters, but wanted to double-check. To my knowledge, commas are allowed in an email "From Name".

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]]>https://forum.cloudron.io/topic/15040/error-saving-mail-display-name-with-comma-mailbox-display-name-is-not-validRSS for NodeWed, 15 Jul 2026 08:08:40 GMTMon, 09 Feb 2026 06:54:35 GMT60<![CDATA[Reply to Error saving mail display name with comma: `mailbox display name is not valid` on Tue, 10 Feb 2026 05:44:52 GMT]]>@girish probably for when we fixed the usernames having trouble with special chars and allowing just a dot which couldn't be deleted!

]]>https://forum.cloudron.io/post/119980https://forum.cloudron.io/post/119980Tue, 10 Feb 2026 05:44:52 GMT<![CDATA[Reply to Error saving mail display name with comma: `mailbox display name is not valid` on Tue, 10 Feb 2026 05:18:38 GMT]]>That's fantastic, thank you @girish! 🙂

]]>https://forum.cloudron.io/post/119979https://forum.cloudron.io/post/119979Tue, 10 Feb 2026 05:18:38 GMT<![CDATA[Reply to Error saving mail display name with comma: `mailbox display name is not valid` on Mon, 09 Feb 2026 10:01:26 GMT]]>Can't say I remember why I added comma to the list of blocked characters in https://git.cloudron.io/platform/box/-/commit/ad3e593f017a2e1e95db19ab7b28bb748d703d58 . Probably a main reason was that it was interfering with shell scripting (the name is injected as an env var). I have removed the comma. We always double quote the env var in script, so it should not be a problem hopefully .

]]>https://forum.cloudron.io/post/119902https://forum.cloudron.io/post/119902Mon, 09 Feb 2026 10:01:26 GMT<![CDATA[Reply to Error saving mail display name with comma: `mailbox display name is not valid` on Mon, 09 Feb 2026 07:55:37 GMT]]>@ccfu I tried in double-quotes but there was no difference, still throws the same error. Single-quotes too.

]]>https://forum.cloudron.io/post/119884https://forum.cloudron.io/post/119884Mon, 09 Feb 2026 07:55:37 GMT<![CDATA[Reply to Error saving mail display name with comma: `mailbox display name is not valid` on Mon, 09 Feb 2026 07:25:54 GMT]]>The comma is a delimiter and can cause problems with some mailservers. Have you tried putting the name inside double quotes?

]]>https://forum.cloudron.io/post/119883https://forum.cloudron.io/post/119883Mon, 09 Feb 2026 07:25:54 GMT