Posttextfiles long seems to have not been something that plays nice with ansi. perhaps if it had been called postansifiles it may have worked better out of the gate. My advise is to stick to text.
I use the PostTextFiles stanza with my advert that happens twice a day
(ooh)... and that advert uses ANSI just fine.
What I had to do was first use the mystic ansi editor to save the ANSI file with no CRLF and then line width of 79 chars, once I saved it like this, it works flawlessly.
Hope this helps for you too.
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|14Best regards,
|11Ch|03rist|11ia|15n |11a|03ka |11Me|03aTLoT|11io|15N
|07ÄÄ |08[|10eml|08] |
15ml@erb.pw |07ÄÄ |08[|10web|08] |15www.erb.pw |07ÄÄÄ¿ |07ÄÄ |08[|09fsx|08] |1521:1/158 |07ÄÄ |08[|11tqw|08] |151337:1/101 |07ÂÄÄÙ |07ÄÄ |08[|12rtn|08] |1580:774/81 |07ÄÂ |08[|14fdn|08] |152:250/5 |07ÄÄÄÙ
|07ÄÄ |08[|10ark|08] |1510:104/2 |07ÄÙ
--- Mystic BBS v1.12 A43 2019/03/02 (Linux/64)
* Origin: The Quantum Wormhole, Ramsgate, UK. bbs.erb.pw (21:1/158)