new user, can't send or receive mail

I'm using version the beta version, 1.14 (5937) on an m1 mac.

I tried setting up a dummy account with the same IMAP settings, but I do not get a connection error. I also tried connecting in a Terminal window like this:

openssl s_client -connect imap.comcast.net:993

This also worked (you need to use Ctrl-D to disconnect if you try this and you get a connection).

Does it work for you, e.g., in Apple Mail?

Just to make sure it's not a fixed issue. You can try the cutting edge release of MailMate: MailMate_r6037

Hmm, very strange. Apple mail works fine.

Mailmate does work on my mac intel laptop but not on my m1 desktop. I tried r6036 as well, no luck.

Here's some of the log from terminal:

No client certificate CA names sent
Peer signing digest: SHA512
Peer signature type: RSA

Server Temp Key: ECDH, prime256v1, 256 bits

SSL handshake has read 6746 bytes and written 450 bytes

Verification: OK

New, TLSv1.2, Cipher is ECDHE-RSA-AES256-GCM-SHA384
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2 Cipher : ECDHE-RSA-AES256-GCM-SHA384 Session-ID: 9B464CB1AE071DDCB077AD4B86F9E6013DFBC90E124B6F71B72AFA548C582493 Session-ID-ctx: Master-Key: C0AC19125FBEFD3FE916A12EABD777DA9C765468AF2E027DCC570BAECBC862B3B3A3D64D26F0FA5550F60B2467049886 PSK identity: None PSK identity hint: None SRP username: None TLS session ticket lifetime hint: 300 (seconds) TLS session ticket: 0000 - 86 4a e1 b9 16 07 e2 fb-bf 98 2c f3 5e 65 b0 3a .J........,.^e.: 0010 - be b2 85 b0 d3 78 d4 1e-3d 8c c9 4a ef 28 98 07 .....x..=..J.(.. 0020 - 72 4d da 20 47 46 9a 47-13 2c c3 27 2f 07 d7 25 rM. GF.G.,.'/..% 0030 - 3c b5 23 ef 0e 58 fa ea-b1 80 35 39 fa 64 a2 f1 <.#..X....59.d.. 0040 - a2 d6 c0 d8 6c a7 70 fb-6d 29 4b 9b 58 83 bc 9e ....l.p.m)K.X... 0050 - e9 d2 5b be 9d 92 38 49-4e 67 ac fa ef 77 90 56 ..[...8INg...w.V 0060 - c7 a8 6a 2b 6e 32 7d ef-16 2a a1 2f f4 ab 34 fb ..j+n2}..*./..4. 0070 - 9b e1 c1 94 9e 01 37 6c-7d 62 42 c9 f6 66 44 11 ......7l}bB..fD. 0080 - df 47 57 1f 36 2e 83 8e-d1 e8 98 6f b0 9b 90 da .GW.6......o.... 0090 - 8b 4f 74 10 c1 da a8 f2-ca b3 4f c7 cc 12 c0 14 .Ot.......O..... 00a0 - 56 a6 0e f8 cf 0e 74 18-60 43 10 3f fc e4 fa 5d V.....t.`C.?...]

Start Time: 1717870116
Timeout   : 7200 (sec)
Verify return code: 0 (ok)
Extended master secret: no

• OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ AUTH=PLAIN AUTH=LOGIN AUTH=OAUTHBEARER AUTH=XOAUTH2] Dovecot ready.

Any local firewall which might work on an app-based basis, e.g., Little Snitch?

Do you have other accounts configured in MailMate which do work?

Other than that I'm out of ideas. I think it's somehow related to your setup, but I'm not really an expert on everything that can go wrong with network setup.