The epistles of Ignatius are spurious or forgeries -
https://depts.drew.edu/jhc/KillenIgnatius.pdf
Ante-Nicene Christian Library: Translations of the Writings of the Fathers Down to A.D. 325. Edited by the Rev. Alexander Roberts, D.D., and James Donaldson, LL.D., Vol. I. The Apostolic Fathers. Ediburgh: T. and T. Clark, 38, George Street. MDCCCLXVII (1867). The Epistles of Ignatius (Shorter and Longer) Introductory Notice; pages 139-140
“...
[page 139] It is now the universal opinion of critics, that the first eight of these professedly Ignatian letters are spurious. They bear in themselves indubitable proofs of being the production of a later age than that in which Ignatius lived. Neither
[page 139-140] Eusebius nor Jerome makes the least reference to them; and they are now by common consent set aside as forgeries, which were at various dates, and to serve special purposes, put forth under the name of the celebrated Bishop of Antioch.” -
Ante-Nicene Christian Library: The Apostolic fathers (1870)
History of the Christian Church by Philip Schaff Vol. II. Ante-Nicene Christianity. A.D. 100-325. Ninth Edition. New York, Charles Scribner's Sons, 1910, page 145
“...
[page 145] The whole story of Ignatius is more legendary than real, and his writings are subject to grave suspicion of fraudulent interpolation. We have three different versions of the Ignatian Epistles, but only one of them can be genuine; either the smaller Greek version, or the lately discovered Syriac.1 In the latter, which contains only three epistles, most of the passages on the episcopate are wanting, indeed; yet the leading features of the institution appear even here" -
History of the Christian Church
A Manual of Church History by Albertt Henry Newman, D.D., LL.D. Professor of Church History in Baylor University, Department Editor of Church History for New Schaff-Herzog Encyclopedia, Author of “A history of the Baptist Churches in the United States”, “A History of Anti-Pedobaptism,”, etc. Volume I Ancient and Mediaeval Church History (To A.D. 1517) Fourth Thousand, Philadelphia American Baptist Publication Society, 1906., pages 222,223,227
“...
[page 222] We have three distinct forms of the Ignatian Epistles, differing greatly as to number, length, and substance. (a) The
longer Greek form is now universally regarded as a gross fabrication, and is supposed to have been composed in the fourth, fifth, or sixth cen-tury. It is full of anachronisms ...” -
A Manual of Church History: Ancient and medi val church history (to A. D. 1517)
“...
[page 223] the shorter Greek form ... Some accept these writings as in the main genuine, but suppose them to have been interpolated to a very considerable extant. ...” -
A Manual of Church History: Ancient and medi val church history (to A. D. 1517)
“...
[page 227] the epistles have been interpolated beyond almost any other document of history. ...” -
A Manual of Church History: Ancient and medi val church history (to A. D. 1517)
The Apostolic Fathers with an English translation by Kirsopp Lake, in Two Volumes, I; I Clement, II Clement, Ignatius, Polycarp, Didache, Barnabas; London : William Heinemann, New York : The Macmillan Co. MCMXII, page 168
“...
[page 168] 2. The short recension. – It was early seen that the long recension contained several letters which were clearly not genuine, and that those which had the most claim to acceptance, as having been mentioned by Eusebius, were greatly corrupted by obvious interpolations. ...
... The text of this recension is nowhere extant in a pure form. ...” -
The Apostolic Fathers : in two volumes. 1. I Clement, II Clement, Ignatius, Polycarp, Didache, Barnabas
The Contemporary Review, Volume XXV. (25) December, 1874 – May, 1875, Strahan 7 Co., Publishers, Paternoster Row, London, 1875; pages 339-340
“...
[page 339] The Ignatian question is the most perplexing which confronts the student of early Church History. ...
... The author of Supernatural Religion has no hesitation on the subject. “The whole of the Ignatian literature,” he writes, “is a
[page 339-340] mass of falsification and fraud.”* “It is not possible,” he says, “even if the Epistle [to the Smyrnaeans] were genuine, which it is not, to base any such conclusion upon these words.” †
And again:-
“We must, however, go much further, and assert that none of the Epistles have any value as evidence for an earlier period than the end of the second, or beginning of the third, century, even if they have any value at all.” ‡
An immediately afterwards: -
“We have just seen that the martyr-journey of Ignatius to Rome is, for cogent reasons, declared to be wholly fabulous, and the Epistles purporting to be written during that journey must be held to be spurious.” § ... * P. 269. † P. 270 ‡ P. 274. § P. 274 ...” -
The Contemporary Review