1.17.2 - SMTP Auth Failing

Got the 1.17.2 update today and now I cannot send emails. Mailspring reports auth failed and I should check username and password.

Ive been through support with my mail provider (spacemail) and all is set up as it should be. I can log in to my webmail with my credentials, so they are correct. Spacemail support say;

“In this case, I recommend contacting the support team of this SMTP app. They may have released an update to their application that caused the issue, or the ports might have been closed on their end. It’s better to clarify this with their support.”

This sending failure happened just after the update. Receiving mail is fine.

Anyone have similar problems? Any ideas?

6 Likes

Got exactly the same error using my OVH account since updating to 1.17.2.

As i saw on another thread (here), seems like the update broke the SMTP auth.

Reverting back to 1.17.0 solved the problem for now, waiting for a “fix update”.

3 Likes

Ah, thanks. Figured it was an issue introduced in the update, and good to hear Im not the only one.

Do you happen to know if there’s a how to on rollback? Need to be sure I don’t nuke everything!

Easy enough in the end. Backed up Mailspring folder in Appdata , uninstalled and reinstalled 1.17.1 and issue is resolved. Didnt need the backup, but prudent to have in any case.

Will be careful with updates in future.

1 Like

No problem.
For the rollback, i simply used previous installer from the GitHub releases page, an all went smoothly (apart from the popup at start asking you to update, but it’s a small annoyance for being able to send mails again)

1 Like

Thanks for this - I have the same problem with the update. Interestingly it is not consistent, my Google accounts are sending fine. I don’t think they use a different protocol?

Edit: I rolled back fine just downloading and running the 1.17.1 installer for Windows, thanks for the tip @anthrax132 !

1.17.1 and 1.17.2 have problems.
I had a problem with Hotmail not signing in and rolled back to 1.16 and it worked or was it a microsoft thing?
Now the rollback with hotmail/created logged in ok but there is no hotmail account showing in left column?
The only way I can the hotmail account is in left column when resetting the cache when it says “scanning”.
Love this software and it has been very dependable.

Same problem here with 1.17.2

----------IMAP----------
connect mailcore::IMAPSession:006FF39C

  • OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ AUTH=PLAIN AUTH=LOGIN] DinaPopper Server ready.
    TLS ssl connect mymailserver.com 993 2
    OpenSSL version: OpenSSL 3.6.0 1 Oct 2025
    connect ok
    login
    1 LOGIN “my email@account.com” “*********”
    1 OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE SNIPPET=FUZZY PREVIEW=FUZZY STATUS=SIZE SAVEDATE LITERAL+ NOTIFY SPECIAL-USE] Logged in
    2 ENABLE QRESYNC
  • ENABLED QRESYNC
    2 OK Enabled (0.001 + 0.000 secs).
    3 NAMESPACE
  • NAMESPACE ((“” “.”)) NIL NIL
    3 OK Namespace completed (0.001 + 0.000 secs).
    login ok
    4 LIST “” “*”
  • LIST (\HasNoChildren \UnMarked) “.” Esborranys
  • LIST (\HasNoChildren \UnMarked) “.” “Deleted Messages”
  • LIST (\HasNoChildren \UnMarked) “.” spam
  • LIST (\HasNoChildren \UnMarked \Trash) “.” Trash
  • LIST (\HasNoChildren \UnMarked \Sent) “.” Sent
  • LIST (\HasChildren \UnMarked) “.” Mailspring
  • LIST (\HasNoChildren \UnMarked) “.” Mailspring.Snoozed
  • LIST (\HasNoChildren \UnMarked \Drafts) “.” Drafts
  • LIST (\HasNoChildren \UnMarked) “.” Archive
  • LIST (\HasNoChildren \UnMarked \Junk) “.” Junk
  • LIST (\HasNoChildren) “.” INBOX
    4 OK List completed (0.002 + 0.000 + 0.001 secs).

----------SMTP----------
220server.com SMTP Ready
OpenSSL version: OpenSSL 3.6.0 1 Oct 2025
init
EHLO HPSantiago

250-PIPELINING
250-SIZE 31457280
250-ETRN
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250 CHUNKING

SASL_PATH:

SMTP Last Response Code: 250
SMTP Last Response:server
PIPELINING
SIZE 31457280
ETRN
AUTH PLAIN LOGIN
AUTH=PLAIN LOGIN
ENHANCEDSTATUSCODES
8BITMIME
DSN
CHUNKING

mailsmtp Last Error Code: 296
mailsmtp Last Error Explanation: Unknown
mailsmtp Last Error Location: 10
mailsmtp Last Auth Type: 2

Please vote for the corresponding bug report: Today’s update breaks SMTP AUTH after STARTTLS (IMAP works) - Bug Reports - Mailspring Community

4 Likes

I just created an account to thank you good sire. :grinning_face:

Seit gestern funktionierte das Senden meiner Mails über Mailspring nicht mehr und ich habe heute den ganzen Tag vergeblich versucht, den Fehler zu finden. Dank deinem Post habe ich Version 1.17.2 deinstalliert und Version 1.17.0 neu installiert und nun funktioniert wieder alles - VIELEN DANK für deinen Ratschlag.
Mailspring wünsche ich, dass sie die Updates vor dem Release besser prüfen, da ein solch fehlerhaftes Update Hunderte von Usern betrifft und verunsichert!

I have the same exact problem with my comcast email ever since doing the update. Is there a correction pending?

I haven’t seen anything public about this yet. Do follow @Radiokot’s suggestion further up in this topic, and click the vote button at the top of the Bug Report. This shows Mailspring that this bug is affecting you, which should affect how soon they fix it.

1 Like

Yes So I cancelled and gone to another no customer support bag of shite

When it will be fix?

The situation when a program update is released without tests scares me.

Yes. I have the same problem. I love Mailspring, but business emails wait for no man of machine. Not sure what to do.

Either access your mail provider via their webmail interface, or roll back mail spring to an earlier version.

Rollback worked for me. I backed up the mail spring folder in appdata, uninstalled the app and installed v 1.17.1.

Turned out it picked up all my settings and mails so I didn’t need to reinstate the backed up folder, but it was reassuring to know it was there, just in case.

Just did. It worked. What a pain. Thanks

Recent release 1.17.3 seems to have corrected the error, so far so good